To our eyes, they often are a blur. But high-speed cameras show us what makes these birds perfect flying machines. A captive Anna’s hummingbird feeds while hovering before an optical illusion in a ...

Arsenal host Tottenham at the Emirates in the first North London Derby of the season. The Gunners will be looking to wash away the bitter taste of their late draw against Sunderland while Spurs will ...

Humming causes the eye to vibrate and this can produce a strobo-scopic effect when a rotating black and white strobe disk is viewed in non-fluctuating light.