Stephen Hawking is at it again, filling our hearts with optimistic predictions about humanity’s boundless potential. Just kidding. His latest estimation gives us about 100 years to leave the planet or die. Although, given the Trump administration’s latest attack on health care, a 100-year window to set ourselves straight seems pretty generous. Last year, the famous theoretical physicist estimated we had a solid millennium to avoid near-certain extinction. Facing threats of climate change, nuclear war, overpopulation, asteroid strikes, and a robot takeover, we do have the odds stacked against us. But why the sudden alteration to Earth’s expiration date? Well, there’s a fairly obvious reason Hawking might be peddling a serious dose of doomsday terror: His new BBC documentary about colonizing Mars, Expedition New Earth, airs this June.

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