Which Unanswered Scientific Question Do You Most Want An Answer To?

For every scientific concept or fact we manage to uncover, there's still so much left out there that's unknown. Today we want to know which of those scientific unknowns you most hope to have revealed within your lifetime.

Whether you're curious about life on Mars, what's going on deep in our oceans, or something else, tell us in the comments what the question is and why it is that you find it so fascinating.


Image: Tadpole Galaxy / Hubble.

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