biology - Trivia, Quizzes, and Brain Teasers | Mental Floss

Why Does Our Hair Grow Darker as We Get Older?

Get ready to be a brunette, kid.

Why Does Our Hair Grow Darker as We Get Older?

8 Historical Methods of Detecting Pregnancy

olia danilevich, Pexels

8 Historical Methods of Detecting Pregnancy

Remembering Sudan, the World's Last Male Northern White Rhino

Tony Karumba, AFP/Getty Images

Remembering Sudan, the World's Last Male Northern White Rhino

The Great Tryptophan Lie: Eating Turkey Does Not Make You Tired

H. Armstrong Roberts/iStock via Getty Images

The Great Tryptophan Lie: Eating Turkey Does Not Make You Tired

Scientists Come Closer to Understanding COVID-19 'Cytokine Storms'

Science is closer to understanding what prompts severe COVID-19 illness.

Why Do Some People Have Dimples?

There's a good chance his parents have dimples, too.

Tasmanian Devils Have Been Reintroduced to Australia’s Mainland After 3000 Years

Jgritz~commonswiki, Wikimedia Commons // CC BY-SA 2.5

100 Fascinating Facts About Earth

The best Spaceball.

62-Year-Old Ball Python at St. Louis Zoo Lays Eggs After Decades of Isolation

David Kenny/iStock via Getty Images

Craving Nature? Your Gut Microbiome Might Be Responsible

These hikers's gut microbes are running the show.

A Stroke of Genius: New Research Shows That Sperm Don’t Slither—They Corkscrew

Sperm have been duping us for nearly 350 years.

Beavers on Devon's River Otter to Become England's First Permanent Population in Centuries

Ray Scott, Wikimedia Commons // CC BY SA 3.0

Why Researchers Believe a 'Crappy' Coronavirus Test Can Help Fight the Pandemic

Cheap tests may be the key to fighting coronavirus.

How Henrietta Lacks Became the Mother of Modern Medicine

A historical marker in Clover, Virginia, honors Henrietta Lacks.

15 Facts About Rosalind Franklin On Her 100th Birthday

Robin Stott, via Flickr // CC BY-SA 2.0

10 Surprising Facts About Alfred Kinsey

Keystone Features / Stringer / Getty Images