The way things behave in microgravity may seem obvious to us now, after humans have been venturing into space for over 50 years.

But we haven’t always been certain how space might affect certain things. Like fire. Or planarian worms. Or even plants. It’s only by conducting experiments that we can learn the answers to these burning questions.

That has led to some pretty fascinating, sometimes upsetting, and sometimes downright wacky experiments conducted in space.

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