NPR has a team. The team makes a show. The show is about science. This week the team shares three stories. The first story is about air. Dirty air is bad for people. It goes into the lungs. It also goes to the brain.
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The second story is about caves. People found old squirrel droppings in caves. These droppings have seeds inside. The seeds tell us about old plants. This helps people learn about the past.
The third story is about the ocean. There are places on the ocean floor. Dead whales gather there. These places are like graveyards. Scientists study them. They learn about life in the sea.
Sources: npr.org