Why do leaves change colors in the fall?

In the 1970s, conservation groups around the world rose up to protect dwindling whale populations, some on the verge of extinction. They all worked under the same banner: Save the Whales! It turned out to be one of the most successful campaigns ever.See omnystudio.com/listener fo ...  Show more

Fever dreams can be unsettling experiences. These ramped up nightmares are vivid, detailed and only happen when the human body experiences a fever. What is it about the combination of fevers and dreams that make these night terrors so hellish? Learn all that and more in this clas ...  Show more

The Autumn of our lives - both literally and figuratively - is a time of change. We go from the vibrancy of summer, to the golds and reds and brisk breezes of the fall, which leads us into the dark of winter. If you aren't embracing all that is Autumn, you'll want to tune into th ...  Show more

Why do leaves change color in the fall? Why are leaves green? Why don't leaves turn all of the colors of the rainbow? In this episode of But Why, we're talking about fall leaves, and how trees go from green to fiery red, orange and yellow.

Botanist and founder of #BlackBotanistsWeek Tanisha Williams explains why some leaves change color during fall and what shorter days and colder temperatures have to do with it.Plus, a bit of listener mail from you! Which you can always send by emailing shortwave@npr.org.See pcm.a ...  Show more

It's obvious that we all have color preferences, but recent research may have discovered why. Learn how the experiments worked in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/favorite-colors.htm Learn more about your ad-choices at https://w ...  Show more