Why are sand and water different temperatures...

Could a cheaper, more environmentally friendly refrigerant already exist, and could corporate lobbying be helping keep it out of American air conditioners? Why did the chemicals once hailed as safe alternatives become environmental villains, and are their replacements actually mu ...  Show more

What happens when a chemist ventures onto Reddit to answer the internet’s most pressing science questions? Why does carbon get its own entire branch of chemistry, what makes fireworks burn different colors, and can an invention work even when its inventor has no idea why? Melissa ...  Show more

At first, it sounds crazy -- wouldn't hot water take longer to freeze? Weirdly enough, the opposite is sometimes true. Join Christian to learn more about a mystery that's puzzled humanity for centuries in this episode of BrainStuff.

Why does water seem to freeze faster when it starts out warmer?See omnystudio.com/listener for privacy information. 

Your body has efficient ways to release excess heat, but high temperatures and high humidity create a sticky situation. Find out how the heat index keeps you abreast of dangerous heat situations in this HowStuffWorks podcast.

Daniel and Jorge get the chills when they discover how little we know about water.See omnystudio.com/listener for privacy information.