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Dr. Universe: What are molecules?
January 25, 2019

A glass of water has more molecules than there are stars in the night sky. And while they are different, they are all made of the same things.

Dear Dr. Universe: What is venom?
December 21, 2018

A lot of different animals, like wasps, spiders, snakes, jellyfish, and scorpions, make venom. Animals like the cone snail, the blue-ringed octopus, and centipedes do, too.