Why Don't Whales Have Legs?

Can you go ice fishing in the ocean? Learners examine the freezing point of different saltwater solutions. Each solution has a different concentration of salt. By comparing the freezing points graphically, they make conclusions about...

Ants head out in the morning to collect food and all return at the end of the day, yet they don't have traffic jams. An intriguing resource compares ant travel patterns to human travel patterns as part of a biology playlist. It discusses...

There are many people who simply don't like the taste of water, whether served hot, cold, or fresh ... so what about day-old water? The video explores why drinking water that sits out overnight tastes stale to some people the next...

Mexico, Brazil, and Australia include the highest numbers of venomous species. An engaging video takes on the idea that venomous animals live in warm climates as part of a larger science series. It discusses possible reasons why this is...

Does perfume really contain whale excrement? Only the most expensive varieties! An intriguing video lesson explains the origin of the ambergris ingredient through a tour through the sperm whale's digestive system. Scientists only...

Is it true that larger animals have longer lifespans than smaller animals? Does an animal's habitat help shape the length of its life? And does the ability to adapt and evolve allow living things to expand their lifespans? Watch a video...

It turns out that some laws were definitely not meant to be broken! A short illustrative video explains why the first and second laws of thermodynamics prevent perpetual motion machines from actually moving perpetually — and why...

That little pink bud in the inside corner of your eye is actually a vestigial eyelid! Find out more about the plica semilunaris, in a short video that explains why vestigial structures hang around.

Although little is know about why whales sing, researchers are developing theories that explain how whales are able to vocalize. Viewers get a short course in whale song and even get to listen to recordings of the haunting melodies...

With leaves as their main source of diet, sloths don't particularly gain a lot of energy when they eat. But how do they maintain such slow lives? Watch a video that explains why sloths are so slow.