Discover July/August 2015

A Dream of Flying
by James McCommons
Whether it's developing self-powered aircraft, wingsuits, jet packs or something even more astounding, for these pioneering daredevils and inventors, the sky is most definitely not the limit.

Climate and the Khan
by Russ Juskalian
A fortuitous shift in weather patterns fueled the Mongol Empire's explosive growth 800 years ago. But will a less favorable change, currently underway, result in catastrophe?

Dark Matter Deniers
by Steve Nadis
Exploring a blasphemous alternative to one of modern physics' most vexing enigmas.

A User's Guide to Rational Thinking
by Christie Aschwanden
Cut through flawed assumptions and false beliefs — including your own — with these strategies.

Special Section: Powering the Future
by April Reese
Innovative technologies and forward-thinking policies can help light the way to a low-carbon world.

The Blind Individuals Who See By Sound
by Berit Brogaard, Kristian Marlow
How the human brain adapts to blindness and allows us to see our world through echolocation.