Video: What is an electron?

When it comes to electrons—one of the fundamental building blocks of all matter—there are lots of unanswered questions. How big are they? What are they made out of? What … are they?

Extreme environments provide clues to extraterrestrial life

Over the past decade, the NASA Astrobiology Institute funded Michigan State University geomicrobiologist Matt Schrenk's lab to study life in the extreme environment of groundwater in a highly alkaline aquifer near Lower Lake, ...

Warm milk makes you sleepy—peptides could explain why

According to time-honored advice, drinking a glass of warm milk at bedtime will encourage a good night's rest. Milk's sleep-enhancing properties are commonly ascribed to tryptophan, but scientists have also discovered a mixture ...

Breath tests could sniff out COVID-19

Since May 2021, drivers crossing into Singapore at the Tuas Checkpoint have been required to breathe into a cigar-sized mouthpiece connected to a mass spectrometer. In less than a minute, the device analyzes the breath samples ...

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