I hate clichés as much as the next guy (actually, probably more than the next guy), but I would nonetheless like to share this bit of carpe diem-like anecdote.
Here's the long and short of it: there are a bunch of dead stars--white dwarfs (or dwarves; both are acceptable)--relatively near us in space (within a few dozen light-years). When the high gravity in these objects pulls enough material into them to cross a certain threshold (known as the Chandrasekhar Limit), they collapse, and the result is a nova or supernova, which blows away anything within a few light years of them and disrupts things a few dozen light years away. These events can't be accurately predicted or stopped. So, if one of these were to happen, it'd be curtains for us. Yes, we wouldn't be around anyway if it weren't for those events, but still...
There's a mother-to-child phrase that seems to apply: "I brought you into this world, and I can take you out of it!"
Now, have a nice day.
