SciShow
When Two Species Mix
We often think of categories as fixed, with a species being a species no matter what. The thing is, life doesn’t have to follow our rules.
TED-Ed
TED-Ed: How do oysters make pearls? | Rob Ulrich
Despite their iridescent colors and smooth shapes, pearls are actually made of the exact same material as the craggy shell that surrounds them. Pearls, urchin spines, the shells of mussels, snails and clams, even coral— all these...
Bozeman Science
AP Biology Lab 8: Population Genetics and Evolution
Mr. Andersen explains Hardy-Weinberg equilibrium and describes the bead lab.
SciShow
Why Are Plants Green Instead of Black?
Nothing says "nature" like a lush green forest. But why are plants green in the first place?
Crash Course
Life Begins: Crash Course Big History
In which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you about the earliest forms of life on Earth, and some of the...
SciShow
This Animal Has a Retractable Anus
Most animals keep their poop chutes on the opposite side of their body from where they eat. But that doesn’t mean it’s always the case, and bryozoans are great examples of how creative you can get with where you put your anus.
SciShow
Why Do We Ride Horses But Not Zebras
Zebras and horses are very similar - so why do we only ride one but not the other?
SciShow
7 Real-Life Unicorns
Unicorns may not exist on this planet, but Earth does have plenty of one-horned creatures that are just as remarkable, if not quite as majestic. Chapters NARWHALS 0:34 RHINOCEROS BEETLES 4:19 ASIAN RHINOCEROS BEETLE RHINOCEROS HORNBILLS...
Be Smart
There Was No First Human
If you traced your family tree back 185 million generations, you wouldn't be looking at a human, a primate, or even a mammal. You'd be looking at a fish. So where along that line does the first human show up? The answer may surprise you
SciShow
Why Is It So Hard to Let Go of Grudges?
We all have some displeasing memories from the past that still make our blood boil. Why are those grudges so hard to let go of?
TED-Ed
TED-Ed: Why do you get a fever when you're sick? | Christian Moro
There are many mysteries around fever, but we do know that all mammals, some birds and even a few invertebrate and plant species feel fever's heat. It has persisted for over 600 million years of evolution. But it has a significant cost:...
SciShow
3 Sad Surprises: The Human Genome Project
Hank tells us three surprises about human DNA which we learned because of the Human Genome Project.
SciShow
Why Y Chromosomes Won’t Be Around Forever
We're generally taught that chromosomes determine an animal's sex, but it is way more nuanced than that.
SciShow
Why Echidnas Are Evolutionary Misfits
It’s pretty well known that Australia is home to some strange animals, but echidnas are especially weird evolutionary misfits.
Be Smart
CRISPR and the Future of Human Evolution
In part 4 of our special series on human ancestry and evolution, we look into the future. Now that genetic engineering tools like CRISPR allow us to edit our genes, how will that impact human evolution going forward? Are designer babies...
Bozeman Science
Comparing DNA Sequences
Paul Andersen shows you how to compare DNA sequences to understand evolutionary relationships. He starts with a brief introduction to cladograms and evolutionary relationships. He shows you how to classify DNA relationships using a...
SciShow
5 Ways Humans Are Influencing Species Evolution
Evolution is a never ending process, but there are some cases where humanity has given it a big push.
TED Talks
TED: A rare galaxy that's challenging our understanding of the universe | Burcin Mutlu-Pakdil
What's it like to discover a galaxy -- and have it named after you? Astrophysicist and TED Fellow Burcin Mutlu-Pakdil lets us know in this quick talk about her team's surprising discovery of a mysterious new galaxy type.
SciShow
Fidelity Hormones, Contagious Behavior, and the Meat-Allergy Plague
This week's SciShow News finds Hank up to his elbows in weird disorders and strange behaviors, including a chemical that makes men stay faithful, new insights into what makes some behavior contagious, and the truth about a disease that...
TED Talks
Mark Pagel: How language transformed humanity
Biologist Mark Pagel shares an intriguing theory about why humans evolved our complex system of language. He suggests that language is a piece of "social technology" that allowed early human tribes to access a powerful new tool:...
SciShow
Facts about Human Evolution
Hank brings you the facts, as they are understood by scientists today, about the evolution of humans from our humble primate ancestors. On the way to becoming Homo sapiens, game-changing evolutionary breakthroughs led to the development...
TED-Ed
TED-Ed: Why are cockroaches so hard to kill? | Ameya Gondhalekar
In ancient Egypt, there was a spell that declared, "Be far from me, O vile cockroach." Thousands of years later, we're still trying to oust these insects. But from poison traps to brandished slippers, cockroaches seem to weather just...
TED-Ed
TED-Ed: Myths and misconceptions about evolution - Alex Gendler
How does evolution really work? Actually, not how some of our common evolutionary metaphors would have us believe. For instance, it's species, not individual organisms, that adapt to produce evolution, and genes don't "want" to be passed...