From SciShow.

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From hypothetical magnetic levitation trains and space elevators that aren’t even attached to the ground, to very real space cannons tested in the 1960s, humans have come up with a lot of ways to hurl stuff into outer space.

Hosted by: Reid Reimers (he/him)

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Sources: https://docs.google.com/document/d/e/2PACX-1vSobCjsh5yQ8Bh6fE8xNjBez9VKXpaQlxfTM2UhB3hL9F0bT4UPB2APWogc_LE_BIA3ojHValNiTmpn/pub