The Toba supervolcano was the biggest explosive eruption of the last 2.5 million years. And humans were around to see it, or at least feel its effects! But what were those effects?

Big-brained scientists have found the mechanism that may have allowed their brains (and all humans') to get so big.

Surround a wild animal with humans, and there are bound to be some changes. Here are five animals that show differences in captivity.

Hank squares off against the host of SciShow Kids, Jessi Knudsen Castaneda, to match wits about chemistry, evolution, and how babies are weird!

Surround a wild animal with humans, and there are bound to be some changes. Here are five animals that show differences in captivity.

There have been reports of animals medicating themselves to treat illnesses, but according to the research, you shouldn't go to a non-human pharmacist just yet.

Big-brained scientists have found the mechanism that may have allowed their brains (and all humans') to get so big.

Today we know that humans and chimpanzees share 99% of their DNA and that we have a lot in common. Not just how we look, but how we behave, form groups, defend our turf, and love each other. People didn't always see other...

Along with humans, orangutans belong to the Hominidae family tree, which stretches back 14 million years. But it's not just their striking red hair that makes orangutans unique among our great ape cousins. Lu Gao shares some amazing...

Meet eight-month-old orangutan Aisha, who's starting to get curious about her surroundings.

Largest great ape to ever live went extinct because of climate change, says new studySource: AP

There are roughly 65,000 Bornean and Sumatran orangutans left in the wild. Both species have a good chance of going extinct in less than ten years due to habitat loss.

San Diego Zoo's Olivia Degn explains how animals are exposed to constant enrichment through inter-species interaction, which can be very interesting to observe.

Fourteen years later, she's living a happy, healthy life.

Orangutans are, along with other great apes, among the most intelligent beings to have evolved on land. As individuals, they display unique and rich personalities.

The mixed-species pairings create a more dynamic experience for the animals and provide constant enrichment through species interaction.

Orangutans are, along with other great apes, among the most intelligent beings to have evolved on land. As individuals, they display unique and rich personalities.

The 8-month-old is at a very curious age.

Orangutans are, along with other great apes, among the most intelligent beings to have evolved on land. As individuals, they display unique and rich personalities.

Fourteen years later, she's living a happy, healthy life.

Here's how you can be a conscious consumer and help save the orangutan, gorilla, bonobo, and chimpanzee.

Orangutans are, along with other great apes, among the most intelligent beings to have evolved on land. As individuals, they display unique and rich personalities.

San Diego Zoo's Olivia Degn explains how animals are exposed to constant enrichment through inter-species interaction, which can be very interesting to observe.

San Diego Zoo's Olivia Degn explains how animals are exposed to constant enrichment through inter-species interaction, which can be very interesting to observe.