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What is venom?

Dear Dr. Universe: What is venom? -Callum, 9

Dear Callum,

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. » More …

How did we discover allergies?

Dear Dr. Universe: How did we discover allergies? -Zion, 8, Australia

Dear Zion,

Before humans even came up with the word “allergy,” they observed how some people would get rashes, sneezes or become really, really sick from different things in their environment. Historians even noted how people in ancient civilizations talked about something called “plant fever,” which gave people runny noses. » More …

Why does it hurt when we hit our funny bone?

Dear Dr. Universe: Why do we have funny bones and why does it hurt so much when we hit that spot on our elbows? -Ms. Hundley and students

Dear Ms. Hundley and Students,

The human body is made up of 206 bones with different names. There’s your skull, or cranium. There’s your finger and toe bones, or phalanges. There’s also your kneecap, or patella. But it turns out, the bone we call the funny bone isn’t really a bone at all. » More …

Dr. Universe: What would happen if you had 3 hearts and one stopped?

What would happen if we had three hearts and one of them stopped? From, Marko, 8, Melbourne, Australia

Dear Marko,

It’s hard to say exactly what would happen if you had three hearts and one of them stopped. Humans, and cats, have just one heart, so we have no experience with this. Octopuses, on the other hand, do have three hearts. » More …