The eagle screams, And with pale beak tears corpses. . . .
Mountains dash together, Heroes go the way to Hel, And heaven is rent in twain. . . .
All men abandon their homesteads When the warder of Midgard In wrath slays the serpent. The sun grows dark, The earth sinks into the sea, The bright stars From heaven vanish; Fire rages, Heat blazes, And high flames play 'Gainst heaven itself"
R.B. Anderson, "Norse Mythology," 1875

NASA seems to spend a lot of time looking for and thinking of ways to divert errant asteroids that might possibly hit earth. However, they keep reassuring the public that the probability of actually being hit by an asteroid is extremely small. So why all the attention?