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What Disturbing Fact Would Ruin Everyone's Childhood?

Inspired by this Reddit thread.

There are some things from childhood that hold a special place in our hearts.

But as adults, we often make weird and shocking discoveries that can change our perception of those things.

For instance, maybe you know that the average lifespan of a lion in the wild is 15 years... and that means if Simba was real, he probably would have died back in 2009.

Perhaps you heard that Big Bird almost joined NASA's Challenger mission "to encourage kids to get interested in space." Had that plan been followed through, millions of kids would have watched Big Bird and the Challenger explode live on TV.

Maybe you learned about the horrible conditions Judy Garland was forced into by MGM Studios during the making of The Wizard of Oz.

Or perhaps you discovered something that truly made your jaw drop, like how one of the former red Power Rangers pleaded guilty to killing his roommate with a sword.

The world is truly wild, so use the DropBox below to reveal the dark and bizarre facts that'll change the way people think about their favorite childhood things.

The best responses will be featured in an upcoming BuzzFeed Community post!