Earth has had it pretty rough. After all that elbowing following the Big Bang, she's had five massive extinction events in her lifetime.
The World Science Festival compiled a simplified breakdown of what exactly happened — and what species took the biggest hits.
Volcanos and oxygen were the biggest instigators of these events. The most familiar is probably the fifth, which is an asteroid hitting Earth and being dinosaurs' ultimate demise.
Here's the breakdown:
Yes, and it's terribleI'm not sureNo, we're just living our lives
5 Of Earth's Most Catastrophic Life-Wiping Events
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What do you think: Are we the sixth biggest mass extinction event?
vote votesYes, and it's terrible
vote votesI'm not sure
vote votesNo, we're just living our lives