Why do we bleed? A hematologist explains how the body prevents blood loss after injury

Blood plays a vital role in keeping us alive, from delivering oxygen to the body’s organs to fighting off infections.

Mikkael A. Sekeres, Professor of Medicine and Chief, Division of Hematology, Sylvester Cancer Center, University of Miami • conversation
Jan. 31, 2022 ~6 min

How many bones do penguins have?

How did penguins end up with so few bones – and become lightning-fast swimmers?

Julie Sheldon, Clinical Assistant Professor of Small Animal Clinical Sciences, University of Tennessee • conversation
Jan. 24, 2022 ~5 min


Why do plants grow straight?

Plants need light to feed themselves, so they grow in ways that help them collect as much of it as they can. Sometimes that’s straight up, but not always.

Beronda L. Montgomery, Professor of Biochemistry and Molecular Biology & Microbiology and Molecular Genetics, and Assistant Vice President of Research & Innovation, Michigan State University • conversation
Jan. 17, 2022 ~4 min

How much candy do Americans eat in a whole year?

A healthy diet can include some candy. But if you eat too much, it can interfere with your appetite for the stuff your body actually needs.

Rahel Mathews, Assistant Professor of Nutrition, Mississippi State University • conversation
Jan. 10, 2022 ~6 min

Why can’t we throw all our trash into a volcano and burn it up?

Volcanoes might seem like nature’s incinerators, but using them to burn up trash would be dangerous and disrespectful to indigenous people who view them as sacred.

Emily Johnson, Research Geologist, US Geological Survey • conversation
Jan. 3, 2022 ~5 min

What's the record for how long it's ever rained without stopping?

Extended periods of rain are most likely found in locations where mountains are near oceans.

Joe Boomgard-Zagrodnik, Postdoctoral Research Associate in Crop and Soil Sciences, Washington State University • conversation
Dec. 20, 2021 ~6 min

Why is my poop brown?

The answer is more complicated than you might think. It has to do with how your body gets rid of old red blood cells.

Hannibal Person, Assistant Professor of Gastroenterology and Hepatology, School of Medicine, University of Washington • conversation
Dec. 13, 2021 ~4 min

Who invented video games?

Video games are everywhere. So who was the first person to come up with the idea of playing a game on a computer screen?

Noah Wardrip-Fruin, Professor of Computational Media, University of California, Santa Cruz • conversation
Nov. 29, 2021 ~7 min


Why are barns painted red?

Barns are practical buildings, designed to safeguard farm animals and equipment. Why are so many of them painted to stand out from the landscape?

Thomas Durant Visser, Professor of Historic Preservation, University of Vermont • conversation
Nov. 22, 2021 ~6 min

Have we made an object that could travel 1% the speed of light?

The fastest things ever made by humans are spacecraft, and the fastest spacecraft reached 330,000 mph – only 0.05% the speed of light. But there are ways to go faster.

Chris Impey, University Distinguished Professor of Astronomy, University of Arizona • conversation
Nov. 15, 2021 ~5 min

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