Our Milky Way Galaxy is thought to harbor millions of black holes, the ultra dense remnants of dead stars. But now, in the universe far beyond our galaxy, there's evidence of something far more ominous. A breed of black holes that has reached incomprehensible size and destructive power. Just how large, and violent, and strange can they get?

Spy satellites first saw these brief but extremely bright flashes of light in the 1960s. For three decades, gamma ray bursts for deep space were one of the persistent mysteries in all of science. It took a revolution in high-energy astronomy to prove that they are the distant birth cries of newborn black holes.

One of the deepest mysteries about how our universe came to be may finally be yielding to human investigation. Scientists are mounting new efforts to figure out how matter survived, and what happened to its birth twin, a mysterious substance known as antimatter?

What are the energy extremes that define our universe? And how much power can the cosmos wield? Climb a ladder of increasingly powerful events, from frigid gas clouds to nuclear explosions, and travel out to the seething environments of black holes. Find out where Earth fits in the vast power scales of the cosmos.