What are the main factors that influence a Nuclear Engineer V's salary?

The primary factors are: 1) Experience Level, 2) Geographic Location, 3) Education/Skills, 4) Company Size & Industry

How does experience change A Nuclear Engineer 's salary?

A Nuclear Engineer 's salary grows with experience: a Nuclear Engineer I (0-2 years)earns $81,829, a Nuclear Engineer II (2-4 years)earns $95,656, a Nuclear Engineer III (4-7 years)earns $116,014, a Nuclear Engineer IV (7+ years)earns $140,155, a Nuclear Engineer V (7-10 years)earns $161,827,

What are the highest paying states for a Nuclear Engineer V?

Nuclear Engineer V salary varies significantly by state. The top 3 highest paying states for Nuclear Engineer V roles are District of Columbia $179,175, California $178,495, Massachusetts $176,116. These tech hubs typically pay 10-15% above the national average.

How much do different types of Nuclear Engineer roles make?

Salaries for Nuclear Engineer level roles vary by specialization: Radiological Engineer V: $161,890; Engineer, Specialist - Nuclear: $140,200; Nuclear Engineer IV: $140,155; Senior Nuclear Engineer: $116,020; Nuclear Engineer III: $116,014.

How do different companies affect a Nuclear Engineer V's salary?

Company size, industry, and compensation structure create significant salary variations for Nuclear Engineer V roles. Large, established industry leaders like C R Bard Inc ($128,509) and Henry Schein Canada ($124,697) offer base salaries 35-40% above the national average. In contrast, smaller firms or startups may offer closer to $82,041.

Nuclear Engineer V Salary in the United States

How much does a Nuclear Engineer V make in the United States?

As of August 01, 2026, the average salary for a Nuclear Engineer V in the United States is $161,827 per year, which breaks down to an hourly rate of $78.

However, a Nuclear Engineer V's salary can vary significantly. Here’s a look at the typical salary range:

Top Earners (90th percentile): $175,601
Majority Range (25th-75th percentile): $153,238 to $169,037
Entry-Level (10th percentile): $145,418

10% $145,418

50% (Median) $161,827

90% $175,601

Nuclear Engineer V Salaries by Percentile

	Annual Salary	Monthly Pay	Weekly Pay	Hourly Wage
75th Percentile	$169,037	$14,086	$3,251	$81
Average	$161,827	$13,486	$3,112	$78
25th Percentile	$153,238	$12,770	$2,947	$74

Salary Factors Salary-Boosting Skills Salary by Experience Related Job Salaries Top Paying Cities Explore Related Jobs

For HR & Compensation Team

What should I pay?

See how Salary.com helps teams price roles more accurately.

Benchmark Nuclear Engineer V with confidence

Get deeper market data to support decisions.

Work Email

Phone No.

Choose a perfect time to talk with a compensation expert.

Book a Demo

Key Factors That Influence Nuclear Engineer V Salaries

A Nuclear Engineer V's salary isn't a fixed number. It's shaped by several important factors. Below, we'll explore how your years of experience, geographic location, education and company size can directly affect your earning potential.

How Experience Level Affects Nuclear Engineer V Salaries?

Experience is a primary driver of a Nuclear Engineer V's salary. As you build your skills and take on more complex tasks, your compensation generally increases. Here's how the average salary grows at different career stages:

Nuclear Engineer I (0-2 years): $81,829
Nuclear Engineer II (2-4 years): $95,656
Nuclear Engineer III (4-7 years): $116,014
Nuclear Engineer IV (7+ years): $140,155
Nuclear Engineer V (7-10 years): $161,827

Job Role	Years of Experience	Average Salary
Nuclear Engineer I	0-2 years	$81,829
Nuclear Engineer II	2-4 years	$95,656
Nuclear Engineer III	4-7 years	$116,014
Nuclear Engineer IV	7+ years	$140,155
Nuclear Engineer V	7-10 years	$161,827

View as Graph

How Do Nuclear Engineer Vs Salaries Vary from State to State?

Your salary can change significantly depending on where you work. States with a higher cost of living and strong industrial sectors often pay more to attract Nuclear Engineer Vs. For example, consider the average annual salaries in these key locations:

District of Columbia: $179,175.
California: $178,495.
Massachusetts: $176,116.

District of Columbia $179,175 California $178,495 Massachusetts $176,116 Washington $175,469 New Jersey $175,404 Alaska $175,178 Connecticut $172,945 New York $172,038

Hawaii $169,142 Rhode Island $167,782 Maryland $166,860 Minnesota $165,598 Colorado $165,112 Illinois $164,950 Oregon $164,335 Delaware $163,882

New Hampshire $163,597 Virginia $162,960 Pennsylvania $161,099 Nevada $160,160 North Dakota $159,853 Michigan $159,367 Wisconsin $159,189 Vermont $158,833

Texas $157,846 Maine $157,781 Arizona $157,684 Ohio $157,571 Georgia $156,082 Indiana $155,338 Wyoming $155,192 Utah $154,966

Iowa $154,868 Kansas $154,092 Louisiana $153,865 North Carolina $153,784 Missouri $153,752 Florida $153,121 Montana $152,781 Nebraska $152,457

Kentucky $152,279 South Carolina $151,632 Tennessee $151,227 Idaho $151,066 New Mexico $149,884 Oklahoma $149,625 Alabama $148,670 South Dakota $147,068

Arkansas $146,195 West Virginia $145,725 Mississippi $144,317

Top Paying Cities for Nuclear Engineer V

Salaries can also vary between different cities. Major metropolitan areas or cities with a high demand for technicians often offer more competitive pay. Here are a few examples of average annual salaries in different U.S. cities:

San Jose: $204,112
San Francisco: $201,878
Oakland: $197,623

San Jose, CA $204,112

San Francisco, CA $201,878

Oakland, CA $197,623

New York, NY $186,326

Paramus, NJ $184,060

Queens Village, NY $184,052

Passaic, NJ $183,899

Bergenfield, NJ $183,884

Stamford, CT $183,528

Huntington, NY $183,462

Newark, NJ $182,266

Bridgeport, CT $181,924

Vallejo, CA $181,602

New Brunswick, NJ $181,538

Petaluma, CA $181,440

Middlesex, NJ $181,133

Somerset, NJ $181,020

Santa Cruz, CA $180,809

Boston, MA $179,822

Monterey, CA $179,254

Seattle, WA $178,884

Santa Rosa, CA $178,851

Los Angeles, CA $178,803

Juneau, AK $178,382

Washington, DC $178,204

Orange, CA $177,628

Santa Ana, CA $177,201

Long Beach, CA $177,039

Anaheim, CA $177,006

Anchorage, AK $176,925

Santa Maria, CA $176,440

Everett, WA $176,408

Danbury, CT $175,838

Bremerton, WA $175,615

Tacoma, WA $175,032

New Suffolk, NY $175,029

Sacramento, CA $174,984

Santa Barbara, CA $174,806

Trenton, NJ $174,628

San Diego, CA $174,628

Brockton, MA $174,450

Fairbanks, AK $174,053

Lompoc, CA $173,640

Lowell, MA $173,509

Ventura, CA $173,479

Nashua, NH $173,446

Stockton, CA $173,430

Modesto, CA $172,249

Poughkeepsie, NY $171,893

Olympia, WA $171,585

Kennewick, WA $171,585

New Haven, CT $171,520

Lawrence, MA $170,938

Hartford, CT $170,776

Riverside, CA $170,744

New Bedford, MA $170,582

Richland, WA $170,582

Bakersfield, CA $170,355

San Bernardino, CA $170,291

New Britain, CT $170,274

Atlantic City, NJ $170,274

New London, CT $170,210

Norwich, CT $170,161

Portsmouth, NH $170,129

Boulder, CO $169,786

Portland, OR $169,562

Worcester, MA $169,546

Minneapolis, MN $169,044

Philadelphia, PA $168,818

Honolulu, HI $168,284

Saint Paul, MN $168,206

Vineland, NJ $168,171

Providence, RI $167,701

Chicago, IL $167,232

Bellingham, WA $167,038

Springfield, MA $166,908

Baltimore, MD $166,860

Chico, CA $166,455

Pittsfield, MA $166,018

Manchester, NH $165,711

Spokane, WA $164,999

Denver, CO $164,983

Albany, NY $164,222

Troy, NY $164,157

Nassau, NY $163,984

Schenectady, NY $163,817

Wilmington, DE $163,688

Burlington, VT $163,461

Salem, OR $163,397

Portland, ME $162,895

Yakima, WA $162,733

Rochester, MN $162,232

Reno, NV $162,151

Fresno, CA $162,151

Milwaukee, WI $162,005

Detroit, MI $161,843

Ann Arbor, MI $161,816

Allentown, PA $161,795

Colorado Springs, CO $161,520

Syracuse, NY $161,439

Carson City, NV $161,439

Houston, TX $161,212

Eugene, OR $161,131

Gary, IN $160,937

Springfield, OR $160,807

Bismarck, ND $160,775

Galveston, TX $160,662

Medford, OR $160,419

Fort Collins, CO $160,354

Concord, NH $160,273

Austin, TX $160,225

Mesa, AZ $159,885

Reading, PA $159,869

Phoenix, AZ $159,853

Dallas, TX $159,804

Saint Cloud, MN $159,649

Madison, WI $159,432

Utica, NY $158,995

Rochester, NY $158,736

Des Moines, IA $158,720

Raleigh, NC $158,704

Atlanta, GA $158,461

Battle Creek, MI $158,412

Salt Lake City, UT $158,364

Lancaster, PA $158,121

Harrisburg, PA $157,895

Kansas City, MO $157,733

Champaign, IL $157,700

Kansas City, KS $157,700

Fort Worth, TX $157,684

Columbus, OH $157,657

Boca Raton, FL $157,619

Pittsburgh, PA $157,555

Richmond, VA $157,490

Indianapolis, IN $157,458

Cleveland, OH $157,441

Las Vegas, NV $157,247

Cincinnati, OH $157,247

Petersburg, VA $157,005

Huntsville, AL $156,762

Lansing, MI $156,653

Lebanon, PA $156,632

Pueblo, CO $156,616

Appleton, WI $156,568

Buffalo, NY $156,503

Dayton, OH $156,454

Racine, WI $156,422

Charlotte, NC $156,406

Saint Louis, MO $156,357

York, PA $156,260

Elkhart, IN $156,260

Gastonia, NC $156,229

Billings, MT $156,191

Beaumont, TX $156,147

Lorain, OH $156,115

Benton Harbor, MI $156,082

Toledo, OH $156,050

Binghamton, NY $155,969

Rock Hill, SC $155,953

Rockford, IL $155,872

Springfield, IL $155,807

Elyria, OH $155,791

Fargo, ND $155,791

Flagstaff, AZ $155,678

Fort Lauderdale, FL $155,580

Duluth, MN $155,483

Miami, FL $155,483

Cheyenne, WY $155,370

Grand Forks, ND $155,370

Bangor, ME $155,014

Cedar Rapids, IA $154,836

Durham, NC $154,768

Louisville, KY $154,755

Grand Rapids, MI $154,723

Hialeah, FL $154,707

Casper, WY $154,480

Scranton, PA $154,286

New Orleans, LA $154,237

Virginia Beach, VA $154,221

Akron, OH $154,140

Peoria, IL $153,930

Sarasota, FL $153,897

Nashville, TN $153,784

Omaha, NE $153,784

Green Bay, WI $153,784

Baton Rouge, LA $153,703

Charleston, SC $153,671

Jamestown, NY $153,590

Davenport, IA $153,590

Tucson, AZ $153,509

Saint Petersburg, FL $153,412

Tampa, FL $153,380

Evansville, IN $153,283

Port Arthur, TX $153,283

Bradenton, FL $153,218

Santa Fe, NM $152,927

Orlando, FL $152,635

Clearwater, FL $152,587

Canton, OH $152,247

La Crosse, WI $152,247

Albuquerque, NM $152,150

Newport News, VA $152,134

High Point, NC $152,085

Ogden, UT $152,020

Corpus Christi, TX $151,891

Norfolk, VA $151,794

Laramie, WY $151,794

Rock Island, IL $151,697

Saginaw, MI $151,664

Jacksonville, FL $151,648

Salisbury, NC $151,616

Boise, ID $151,583

Moline, IL $151,502

Fort Myers, FL $151,454

Memphis, TN $151,422

Tulsa, OK $151,341

Waterloo, IA $151,244

Spartanburg, SC $151,082

Lincoln, NE $151,001

Fort Wayne, IN $150,968

Provo, UT $150,952

Cedar Falls, IA $150,758

San Antonio, TX $150,693

Greensboro, NC $150,629

South Bend, IN $150,612

Savannah, GA $150,434

Muskegon, MI $150,370

Birmingham, AL $150,353

Winston Salem, NC $150,274

Lake Charles, LA $149,884

Anderson, IN $149,852

Lexington, KY $149,803

Augusta, GA $149,755

Greenville, SC $149,755

Lima, OH $149,625

Wichita, KS $149,609

Tuscaloosa, AL $149,609

Columbia, SC $149,463

Springfield, OH $149,431

Asheville, NC $149,172

Bloomington, IN $149,059

Knoxville, TN $148,476

Shreveport, LA $148,460

Wilmington, NC $148,250

Roanoke, VA $148,250

Topeka, KS $147,958

Frankfort, KY $147,941

Oklahoma City, OK $147,829

Chillicothe, OH $147,764

Longview, TX $147,748

Melbourne, FL $147,732

Sioux Falls, SD $147,473

Mobile, AL $147,457

Terre Haute, IN $147,392

Altoona, PA $147,295

Amarillo, TX $147,182

Killeen, TX $147,133

Fayetteville, AR $147,004

Chattanooga, TN $146,955

Sioux City, IA $146,809

Idaho Falls, ID $146,777

Lynchburg, VA $146,648

Gainesville, FL $146,437

Portsmouth, OH $146,356

Little Rock, AR $146,324

Lafayette, LA $146,259

Youngstown, OH $146,259

Daytona Beach, FL $146,162

Clarksville, TN $146,146

Pensacola, FL $146,130

Temple, TX $146,118

Hopkinsville, KY $145,644

Erie, PA $145,612

Florence, SC $145,547

Charleston, WV $145,288

Great Falls, MT $145,207

Macon, GA $144,981

Tallahassee, FL $144,965

Fayetteville, NC $144,932

Waco, TX $144,900

Helena, MT $144,787

Pine Bluff, AR $144,725

Vincennes, IN $144,528

Lubbock, TX $144,463

Alamogordo, NM $144,366

Twin Falls, ID $144,220

Rapid City, SD $144,172

Jackson, MS $143,880

Huntington, WV $143,869

Greenville, MS $143,864

Parkersburg, WV $143,699

Montgomery, AL $143,670

Wichita Falls, TX $143,508

Springfield, MO $143,508

Biloxi, MS $143,427

Monroe, LA $143,265

Johnstown, PA $143,152

Sumter, SC $143,087

Columbus, GA $143,071

Pascagoula, MS $142,764

Abilene, TX $142,764

Kingsport, TN $142,343

Albany, GA $142,343

Gulfport, MS $142,294

Alexandria, LA $141,760

Fort Smith, AR $141,356

El Paso, TX $140,919

Las Cruces, NM $140,191

Harlingen, TX $139,780

Pocatello, ID $139,754

Florence, AL $139,543

Brownsville, TX $139,511

Mcallen, TX $139,171

Dothan, AL $138,945

Columbus, MS $137,983

Altus, OK $137,229

Lawton, OK $136,922

Pierre, SD $136,339

What Skills Can Increase a Nuclear Engineer V's Salary?

Demanded Skills for the Role:

Analysis (Mentioned in 7.69% Job Postings): Analysis is the process of considering something carefully or using statistical methods in order to understand it or explain it.
Hydraulics (Mentioned in 5.13% Job Postings): Hydraulics is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids.
SOW (Mentioned in 5.13% Job Postings): Sow is A statement of work is a document routinely employed in the field of project management. It is the narrative description of a project's work requirement

Skills	Demand Percentage
Analysis	7.69%
Hydraulics	5.13%
SOW	5.13%

See More Skills

What skills can make your compensation higher?

Mastering certain specialized skills can lead to a significant increase in pay. Here are examples of skills and the potential impact they can have on a Nuclear Engineer V's salary.

Consulting: Can increase your salary by up to 29%.
Analysis: Can increase your salary by up to 3%.

Skill	Salary	Salary % Increase
Consulting	$208,757	29%
Analysis	$166,682	3%

Get Latest Data

Nuclear Engineer V Salary by Company Size: Startups vs. Enterprise

Nuclear Engineer V salary potential scales significantly with company size. Data shows that Enterprise companies (5,000+ employees) pay the highest average salary at around $180,872. While startup companies pay approximate $153,305.

Nuclear Engineer V Salary by Company Size

Company Size	Employees	Average Salary
Startup	1~50	$153,305
Growth Stage	51~500	$162,046
Established	501~5000	$174,746
Enterprise	5000+	$180,872

Nuclear Engineer V Salary by Industry: Top Paying Sectors

For Nuclear Engineer V roles, the industry you choose can affect earning potential by as much as 130% (the gap between the highest and lowest paying industries). Data shows that the Software & Networking and Energy & Utilities sectors offer the strongest compensation, at 50% above the average. In contrast, Nuclear Engineer positions in Transportation or MFG Durable typically offer lower base pay, as these industries often view Nuclear Engineer V as a support function rather than a direct revenue driver.

The top paying industries for a Nuclear Engineer V

Industry Sector	Average Annual Salary	Average Hourly Rate	Pay vs.Avg
Software & Networking	$242,740	$117.0	50%
Energy & Utilities	$226,558	$109.0	40%
Biotechnology	$210,375	$101.0	30%
Aerospace & Defense	$194,192	$93.0	20%

How Education impacts an Nuclear Engineer V's Salary?

Your level of education can impact your salary potential. While many Nuclear Engineer V enter the field with a Bachelor's Degree, higher education can lead to more specialized and higher-paying roles.

According to our 100% employer-reported salary data, the median salary for an Nuclear Engineer V with a Bachelor's Degree is between $174,162 and $183,479.

Nuclear Engineer V Salaries by Degree Level

$186,900
$185,100
$183,300
$181,500
$179,600
$177,800
$176,000
$174,200

Typical Education for Nuclear Engineer V
Degree Level	% of user with this level of education
No Diploma	1.6%
High School	1.6%
Associates	25.4%
Bachelors	25.4%
Masters	34.9%
Doctorate	36.5%

View as Graph

Nuclear Engineer V Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how a Nuclear Engineer V's annual salary breaks down can help with budgeting. Below, you can see the average hourly rate, weekly pay, and monthly pay for this role. Use the buttons to switch between different pay periods.

$153,238

Average $161,827/year

$169,037

$12,770

Average $13,486/month

$14,086

$2,947

Average $3,112/week

$3,251

$74

Average $78/hour

$81

	Annual Salary	Monthly Pay	Weekly Pay	Hourly Wage
75th Percentile	$169,037	$14,086	$3,251	$81
Average	$161,827	$13,486	$3,112	$78
25th Percentile	$153,238	$12,770	$2,947	$74

Nuclear Engineer V Salary Growth & Career Path

Nuclear Engineer V

Next Role

Advancement

Promotions are the fastest way to increase your earnings. As a Nuclear Engineer V, you have the following paths for advancement. The table below compares the salary raises for common next-step roles. By comparing these figures, you can choose the career path that best meets your financial goals.

Nuclear Engineer V Salary Growth and Career Path
Next Step Role	Estimate Salary	Projected Raise
Aeronautical Engineer VI	$199,473	23%
Aerospace Engineer VI	$199,124	23%
Engineer VI	$187,043	16%
Guidance, Navigation & Control Engineer VI	$212,084	31%

Salary Trends for Nuclear Engineer V

Salaries for a Nuclear Engineer V can change over time, reflecting shifts in market demand and the overall economy. The median salary decreased from $159,567 in 2023 to around $154,172 in 2025, reflecting changes in demand, location, experience, and the wider economy. For a detailed analysis of Nuclear Engineer V salary trends, .

Average Annual Salary of Nuclear Engineer V Over Time

$???
$159,567
$156,522
$154,172
$???
$???

2022
2023
2024
2025
2026
2027

Year	Average Annual Salary
2022	View More
2023	$159,567
2024	$156,522
2025	$154,172
2026	View More
2027	View More

Most common benefits for Nuclear Engineer V

Social Security
401 (k)
Disability
Healthcare
Pension
Time Off (days)

Common company salaries for Nuclear Engineer V

Here are companies hiring for Nuclear Engineer V and their salaries, click below for more details.

C $128,509/per year

C R Bard Inc Biotechnology the United States

H $124,697/per year

Henry Schein Canada Biotechnology the United States

N $123,899/per year

Nordex Inc Biotechnology the United States

N $120,416/per year

Nipro Corp Biotechnology the United States

E $115,870/per year

Enovis Biotechnology the United States

A $114,553/per year

Advanced Research Projects Agency - Energy Biotechnology the United States

M $112,110/per year

MiniMed Inc Biotechnology the United States

L $111,500/per year

Labcorp Drug Development Biotechnology the United States

L $110,229/per year

Life Technologies Corp Biotechnology the United States

Z $106,224/per year

Zimmer Biomet Biotechnology the United States

P $103,077/per year

Promontory Therapeutics Biotechnology the United States

S $102,181/per year

Steris PLC Biotechnology the United States

G $97,274/per year

Gavin Conferences Pty Ltd Biotechnology the United States

E $94,764/per year

Endeavor BioMedicines Biotechnology the United States

R $94,402/per year

Replay Holdings LLC Biotechnology the United States

P $94,235/per year

Pleno Inc Biotechnology the United States

S $93,666/per year

Simulaids Inc Biotechnology the United States

N $88,880/per year

NOIRLab/CAS Biotechnology the United States

O $86,468/per year

Onward Technology Biotechnology the United States

L $84,895/per year

LED Medical Diagnostics Inc Biotechnology the United States

E $84,682/per year

Eyeco Ltd Biotechnology the United States

P $84,523/per year

Paerosol Biotechnology the United States

I $83,525/per year

IONIQ Sciences Inc Biotechnology the United States

S $82,815/per year

Stateside PPE Biotechnology the United States

D $82,041/per year

Digi Bio Biotechnology the United States

Find Your Next Nuclear Engineer V Job

Ready to take the next step in your career? Browse thousands of current Nuclear Engineer V job openings on our job board. Use the search bar below to find your perfect match.

For Employees

Analyze the market and your qualifications to negotiate your salary with confidence.

Get a Salary Increase

Search thousands of open positions to find your next opportunity.

Search Job Openings

For Employers

Individualize employee pay based on unique job requirements and personal qualifications.

Adjust Employee Salary

Get the latest market price for benchmark jobs and jobs in your industry.

Price My Industry Jobs

FAQ about Nuclear Engineer V

1. Where can a Nuclear Engineer V earn the most?

A Nuclear Engineer V's earning potential can vary widely depending on several factors, including location, industry, experience, education, and the specific employer. According to the latest salary data by Salary.com, a Nuclear Engineer V earns the most in San Jose, CA, where the annual salary of a Nuclear Engineer V is $204,112.

2. What is the highest pay for Nuclear Engineer V?

The highest pay for Nuclear Engineer V is $175,601.

3. What is the lowest pay for Nuclear Engineer V?

The lowest pay for Nuclear Engineer V is $145,418.

4. What are the responsibilities of Nuclear Engineer V?

Designs and initiates processes to gain benefit from nuclear energy and radiation. Conducts research into problems of nuclear energy systems. Designs and develops nuclear equipment. Monitors testing, operation, and maintenance of nuclear reactors. May require a master's degree in nuclear engineering or related field. Typically reports to a manager or head of a unit/department. Works autonomously. Goals are generally communicated in "solution" or project goal terms. May provide a leadership role for the work group through knowledge in the area of specialization. Works on advanced, complex technical projects or business issues requiring state of the art technical or industry knowledge. Typically requires 10+ years of related experience.

5. What industry pays the highest salary for Nuclear Engineer V?

The Software & Networking industry offers the highest average compensation for Nuclear Engineer V roles, with salaries approximately 50% above the market median.

Where Does Our Salary Data Come From?

Salary.com provides salary estimates, histograms, trends, and comparisons using data from employer job postings and third-party sources.

We offer detailed salary information across multiple percentiles for your reference. (Click here to learn Why the Salary Midpoint Formula Is Crucial for Achieving Pay Equity.)

With the most extensive online, real-time compensation data available, Salary.com helps you pinpoint your exact pay target.

Are you an HR manager or compensation specialist?

Salary.com's CompAnalyst platform offers:

Detailed skills and competency reports for specific positions
Job and employee pricing reports
Compensation data tools, salary structures, surveys and benchmarks.

Learn about