An expedition in the Gulf of Mexico gets to the core of the most important event in the past 100 million years.
‘For billions of years, it waited. A city-sized chunk of primordial space rock circled the solar system somewhere between the orbits of Mars and Jupiter. Earth took shape. Life evolved. And all the while, the space rock just drifted, tumbling end over end like a poorly thrown football. Then, some unknown celestial mechanics shoved this 9-mile-wide projectile out of its orbit. Destination: Earth. The asteroid belt escapee arrived 66 million years ago.’