Why do we need blood? @MysterySci
Why do we need blood? @MysterySci
Uploaded December 2019 | Updated September 2026, 48 minutes ago
Are your kids wondering: “Why do we need blood?” This question came from Beckett, a student from the US. Like, share, and vote on next week's question here: mysterydoug.com/vote
Why do we need blood?Where does salt come from?Whats the most dangerous animal in the ocean?Do people really use robots?How do squirrels find the acorns they hide?What was the Ice Age like?Whats the biggest apple in the world?Whats it like to be a twin?Can any animal outrun a cheetah?Can trees talk to each other?How were LEGO bricks invented?Are aliens real?
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Why do we need blood?

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