Splicing together footage from more than 12,000 films, Christian Marclay’s cinematic masterpiece might be the most complex clock ever built. (It’s definitely one of the most mesmerizing.) It’s high ...

Non-24-hour sleep-wake disorder (N24SWD) occurs when your sleep-wake cycle gradually shifts out of sync with the 24-hour day. It affects about half of blind people, but it can also affect those with ...

Bacteria use their internal 24-hour clocks to anticipate the arrival of new seasons, according to research carried out with the assistance of an 'ice bucket challenge.' Bacteria use their internal ...