Have you ever wondered why some primates have such a red, prominent rear end? Turns out that many monkeys use their bums for communication! Learn all about this butt chat in this episode of SciShow!

When it comes to sex things can be complicated, but for the three species we are looking at today, sex is really hard.

If it smells like delicious buttered popcorn when you are in a middle of the forest, it’s not because there’s a movie theater nearby, but Binturongs, arboreal carnivore, might be.

Scientists estimate that about 2% of our DNA is from Neanderthals. In this week, the journal Cell showed what those Neanderthal DNA do to our genome.

Although polar bears and grizzly bears aren't all that similar and are definitely separate species, they can interbreed and create fertile offspring in the wild. Hank brings us the story of these misfit bears, which he likes to call...

If it smells like delicious buttered popcorn when you are in a middle of the forest, it’s not because there’s a movie theater nearby, but Binturongs, arboreal carnivore, might be.

Nuclear energy has a bit of a bad rap, but there's an element out there that might make them safer and more efficient.

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

Scientists have learned more about why royal jelly makes queen bees, and we peek at the tiny and terrifying mandibles of trap-jaw ants.

When it comes to sex things can be complicated, but for the three species we are looking at today, sex is really hard.

Howcast - Couples who don't want to use artificial means of contraception like hormonal birth control or condoms can manage their fertility by checking for signs they're ovulating. See which natural method may be right for you.

The Crusader castles of Jordan, such as Qalaat Ar-Rabad, Shoubak, and Kerak, stand as monumental reminders of the fierce battles between Christians and Muslims during the Crusades. These strategic fortresses, built for military power and...

Flat land around a river or stream that is prone to occasional or frequent flooding.
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Key scientific terms defined in just 60 seconds using stunning images and concise textual...

They are seeking the world's most dirty fuel, but the oilmen of Barrow Island are also helping to conserve rare and endangered species. A story of ecologically-responsible oil extraction. Earth Science - Human Impacts - Learning Points....

The cycles of the Moon are said to affect reproductive rhythms, from humans to coral. How could this be? Physics - Our Solar System - Learning Points. The Moon exerts a strong influence over life cycles on Earth. Cycles of the Moon have...

Discover the systematic grouping of organisms according to the structural or evolutionary relationships among them.
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Biology - Adaptation And Evolution - L
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Californian redwoods are some of the oldest and largest living organisms on the planet. How do they grow so tall and why are they under threat? Biology - Ecosystems - Learning Points. The coniferous forests on the pacific coast of North...

Discover more about depositional features, such as floodplains and levees. Some of the world's largest deltas are visible from space. What are these fertile and diverse features, and how are they formed? Earth Science - Geology -...

Deciduous forests occur worldwide from Britain to China. Discover the dramatic seasonal changes that take place in these habitats, as well as the vast array of plant and animal life found within them. Biology - Ecosystems - Learning...

The most basic unit in the classification of types of organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...

True or false … Mountain soil is always thin and infertile?
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People and places - Physical geograp
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y - Mountains


A Twig Tidbit Film - True or False? The children have to determine if a statement is...

Explore how the Ganges river dramatically sculpts the landscape in the Bay of Bengal.
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Material processes - Classifying ma
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Water can wa
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Find out why the ancient Egyptian Empire owed its success to to the River Nile.
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People and places - Physical geog
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Learning Points
The fertile floodplain of the River Nile...

Medical researchers successfully restored the fertility of a woman rendered infertile by chemotherapy treatment, leading to the birth of a healthy baby girl. Using cryopreservation techniques, the researchers transplanted healthy ovarian...