There's a Hole in the Sky

Via Slashdot comes this:

A joint U.S.-Czech team from Southwest Research Institute (SwRI) and Charles University in Prague suggests that the parent object of asteroid (298) Baptistina disrupted when it was hit by another large asteroid, creating numerous large fragments that would later create the Chicxulub crater on the Yucatan Peninsula as well as the prominent Tycho crater found on the Moon.

Wish them good luck finding the rest of those giant fragments. Meanwhile, prepare to duck and cover.