Are there any planets outside of our solar system?

Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?

Jean-Luc Margot, Professor of Earth, Planetary, and Space Sciences, University of California, Los Angeles • conversation
July 19, 2021 ~7 min

A pediatric nurse explains the science of sneezing

People sneeze for many reasons and in many ways. One of them is to protect your airways from irritants and infectious disease.

Meg Sorg, Clinical Assistant Professor of Nursing, Purdue University • conversation
June 28, 2021 ~6 min

Does outer space end – or go on forever?

Astronomers know a lot about what's in outer space – and think it's possible it never ends.

Jack Singal, Associate Professor of Physics, University of Richmond • conversation
June 21, 2021 ~6 min

Why do cats knead with their paws?

According to a veterinarian, the behavior some people call 'kneading the dough' or 'making biscuits' is a clue your cat feels comfortable around you.

Julia Albright, Associate Professor of Veterinary Medicine, University of Tennessee • conversation
June 14, 2021 ~4 min

Why are some mushrooms poisonous?

Poison can be a deadly defense that helps a mushroom make sure its spores are spread to new places to grow into baby mushrooms.

Karen Hughes, Professor of Mycology, University of Tennessee • conversation
June 7, 2021 ~6 min

How much energy can people create at one time without losing control?

Scientists are working on ways to make lots of energy by converting matter into energy. The trick is keeping the process under control. One possibility is nuclear fusion – the Sun's power source.

Xuejian Wu, Assistant Professor of Physics, Rutgers University - Newark • conversation
May 17, 2021 ~6 min

How much sleep do you really need?

Getting a good night's sleep on a regular basis can help you do well in school or at work. It might even make you better-looking.

Dana McMakin, Associate Professor of Psychology, Florida International University • conversation
May 10, 2021 ~5 min

How do people make paper out of trees, and why not use something else?

People have painted on cave walls, written on clay and wax tablets, papyrus, and paper made from wood. Could screens replace paper someday?

Beverly Law, Professor Emeritus of Global Change Biology and Terrestrial Systems Science, Oregon State University • conversation
April 26, 2021 ~7 min

How did humans evolve, and will we evolve more?

Our biggest evolutionary advantages are an ability to walk on two legs and our big brains.

Evan Simons, Postdoctoral Research Associate in Anthropology, University at Buffalo • conversation
April 5, 2021 ~5 min

How did humans evolve, and will they evolve more?

Our biggest evolutionary advantages are an ability to walk on two legs and our big brains.

Evan Simons, Postdoctoral Research Associate in Anthropology, University at Buffalo • conversation
April 5, 2021 ~5 min

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