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...

Viewers learn how eyes work to focus on objects. They see how a lens with a different shape changes the point of focus, requiring people to wear glasses or contacts. Viewers then learn how humans' eyes are different from other animals. 

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...

In an invertebrate beauty pageant, why do millipedes always scuttle away with the crown? Part four of a five-part series of Invertebrate videos compares and contrasts the millipede with the centipede in terms of diet, behavior, and body...

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...

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...

Are great white sharks too big for captivity? Why don't great whites survive in aquarium tanks? View this short video that explains why great white sharks have a history of dying in aquarium captivity.