Rae Ellen Bichell

Rae Ellen Bichell is a reporter for NPR's Science Desk. She first came to NPR in 2013 as a Kroc fellow and has since reported Web and radio stories on biomedical research, global health, and basic science. She won a 2016 Michael E. DeBakey Journalism Award from the Foundation for Biomedical Research. After graduating from Yale University, she spent two years in Helsinki, Finland, as a freelance reporter and Fulbright grantee.

Exposure to lead as a child can affect an adult decades later, according to a study out Tuesday that suggests a link between early childhood lead exposure and a dip in a person's later cognitive ability and socioeconomic status.

Lead in the United States can come from lots of sources: old, peeling paint; contaminated soil; or water that's passed through lead pipes. Before policies were enacted to get rid of lead in gasoline, it could even come from particles in the fumes that leave car tailpipes.

There is such a thing as a memory athlete. These are people who can memorize a truly insane amount of information really quickly, like the order of playing cards in a deck in under 20 seconds, or 200 new names and faces in a matter of minutes.

Neuroscientists writing Wednesday in the journal Neuron found these champs of memorization aren't that different from the rest of us.

When you step outside after a big rainstorm and take a deep whiff of that fresh, earthy smell, you're mostly smelling a chemical called geosmin.

It's a byproduct of bacteria and fungi. And something about rain lofts the chemical — and sometimes the organisms themselves — into the air, a process that not only helps release that earthy smell but may, in very rare conditions, spread diseases.

Somehow raindrops launch tiny living things off the ground.

It's not clear when or where life on this planet began, but scientists are working hard to find out.

Now, researchers writing in the journal Nature say they found fossils of what could be some of the earliest known creatures to grace the Earth, embedded in rocks that are at least 3.7 billion years old.

Initially, Clint Perry wanted to make a vending machine for bumblebees. He wanted to understand how they solve problems.

Perry, a cognitive biologist at Queen Mary University of London, is interested in testing the limits of animal intelligence.

"I want to know: How does the brain do stuff? How does it make decisions? How does it keep memory?" says Perry. And how big does a brain need to be in order to do all of those things?