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Giving coffee a jolt could help assess its quality

NPR's science podcast Short Wave looks at the secrets behind scorpions' weapons, using electricity to measure the quality of a cup of coffee, and what shapes the content of dreams.

Copyright 2026 NPR

Emily Kwong
Emily Kwong (she/her) is the founding reporter and now co-host for Short Wave, NPR's daily science podcast. Her first homework assignment in kindergarten was to bring in a leaf to class. She's been looking at trees ever since.
Rachel Carlson
Rachel Carlson (she/her) is a production assistant at Short Wave, NPR's science podcast. She gets to do a bit of everything: researching, sourcing, writing, fact-checking and cutting episodes.