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...

Woodpeckers withstand more than 4,000 Gs without getting a concussion, yet humans only withstand up to 300 without getting one. An eye-opening video explains the difference in anatomy between humans and woodpecker brains as part of a...

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...

Why are Sherpas so uniquely equipped to guide aspiring mountain climbers up Mount Everest? Learn all about the biological ways that Sherpas can survive in a low-oxygen environment with an informative 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...

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...

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...

Our bodies simply aren't built for such a sedentary existence. Discover what happens to our bodies when we don't practice what we are built to do—move!

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.