"It's death on an unimaginable scale, when a majority of Earth's species quickly die out. It's called "mass extinction," and it's happened at least five times before. Cataclysms, such as supervolcanoes or asteroids, are thought to cause these events, but some experts believe a manmade mass extinction could be next. Is our planet in trouble? And if so, is there anything we can do to stop the next catastrophic annihilation? Experts are traveling the world, performing groundbreaking scientific detective work to answer these very questions."

"There may never be a virus as deadly or as misunderstood as AIDS. Responsible for 36 million deaths since its discovery in 1981, it remains shrouded in myths, misconceptions, and mistruths... until now. Scientists deep in the African Congo have discovered forgotten clues that are rewriting the story of the global pandemic and revealing shocking facts about its origins. Now the race is on to see if these new findings are the key to developing a vaccine that could finally win the epic battle against HIV."