Brian Callahan

The tornado that struck El Reno, Oklahoma, on May 31, 2013, defined superlatives. It was the largest twister ever recorded on Earth.

The tornado that struck El Reno, Oklahoma, on May 31, 2013, defined superlatives. It was the largest twister ever recorded on Earth.

On a summer's night, there's nothing more magic than watching the soft glow of fireflies switching on and off. Few other life forms on land can light up the night, but in the dark depths of the oceans, it's a different story: nearly 90% of all species shine from within. Whether it's to scare off predators, fish for prey, or lure a mate, the language of light is everywhere in the ocean depths, and scientists are finally starting to decode it.

In 2009 a bizarre story spreads around the globe, reported as fact in the world’s newspapers: Josef Mengele – the infamous escaped Nazi concentration camp doctor, the Angel of Death, may have succeeded in his lifelong goal of creating a blonde, blue-eyed master race. An historian says he has evidence that Mengele’s bizarre experiments on twins may not have ended at Auschwitz, that his efforts to engineer an Aryan master race continued and succeeded while on the run in South America.