The Indigenous peoples of the Bolivian highlands are survivors. For thousands of years they have lived at altitudes of more than two miles, where oxygen is about 35 percent lower than at sea level.

Our vision is amazing. We can judge distances, recognise objects, navigate rugged terrain, catch a frisbee, and so much more based on slight differences in the light that enters our eyes. Decoding all ...

As you read this, the screen is probably flashing over 240 times per second, yet, as a human, you won’t notice this flickering light. However, to a fruit fly hovering above your head, the screen would ...