Wanna know what keeps (or ought to) biologists awake all night?
How much of life currently on this planet will end. Not wondering, but knowing that we, humans, who can wonder about the beginning and the end of the entire universe, are causing another mass extinction of life. Right here. Right now.
On this very pale blue dot where the most improbable of things in the universe (question 3 keeping those physicists awake all night; really, guys?!) happened: life evolved. To the point where it could begin to wonder about the universe. To keep itself awake all night wondering about the universe.
Then kill itself?
What keeps you up at night?