Venture back to the birth of space and time as NOVA probes the mystery of the Big Bang. The Big Bang is when the cosmos started and time itself began. With stunning animation based on space telescope ...

The asteroid released the equivalent of 10-billion nuclear bombs worth of energy when it struck Earth. The impact started a chain of events that wiped out 75% of all plants and animals at the time.

On the day that NOVA's "Ultimate Mars Challenge" aired, I was invited to attend a modest little gathering held in its honor. It was one of those times when I realized that I was clearly the least ...