Are Blue Eyes Endangered?

SciShow explains the genetics — and physics — behind why blue eyes are blue, and what the future may be for the trait. Spoiler alert: Blue eyes aren’t really blue! SciShow explains!

Guest host Michael Aranda discusses gene patents, and whether they help or hurt science.

Why Ferns Have More Chromosomes Than You

Chromosomes are fascinating little things, and today, Hank explains why more of them doesn’t mean more complex, and why different organisms have different numbers of chromosomes.  The short answer: mistakes happen.

Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids?
Tardigrade Poster:
SciShow Mug:
SciShow Shirt:

Looking for SciShow elsewhere on the internet?

Twins X Twins = Twins?

At SciShow, we ask the tough questions.  Today we explore the answer to the question “if identical twin brothers married identical twin sisters, would their offspring be identical?”

Elizabeth Blackburn: Great Minds

Hank brings us the story of Elizabeth Blackburn, the Nobel Prize-winning Australian woman who discovered telomeres and telomerase, and helped scientists begin to understand the process of aging at a genetic level.

Hank brings us the story of Gregor Mendel, the Austrian monk who, with the help of a garden full of pea plants, discovered the fundamental properties of inheritance and paved the way for modern genetics. He also gives us the dirt on a scientific scandal that has followed Mendel beyond the grave.

Like SciShow on Facebook:
Follow SciShow on Twitter:

Mendelian traits in humans:

Mendel-Fisher Controversy -

Mendel Biography -

Mendel’s genetics -

Campbell Biology, 9th ed.

Laser fusion! Gorilla genome! Meteorites! Game orchestration! Irish Scientists!

Early humans apparently had very interesting sex-lives!