We've all worked with, dated or come across an alpha male, but have you considered they could actually be a sigma male? We all know that an alpha male is highly intelligent, confident, and successful.

Canadian-US actor Keanu Reeves, supposedly a high-profile example of a "sigma male." (Photo by Mark RALSTON / AFP) (Photo credit should read MARK RALSTON/AFP via Getty Images) Are you tired of ...

Some know “sigma” as the 18th letter of the Greek alphabet but it’s also teen slang for a cool dude. According to Know Your Meme, sigma is “referring to a supposed classification for men who are ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. A bullshit concept ...

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