Going without sleep can become dangerous quickly, with symptoms like cognitive impairment and hallucinations appearing after just a few nights. After 24, 36, 48, and 72 hours without sleep, problems ...

Feb. 2, 2026 Hidden lava tunnels on the Moon and Mars could one day shelter human explorers, offering natural protection from radiation and space debris. A European research team has unveiled a bold ...

Going to bed earlier and waking in the early morning often matches humans’ natural circadian rhythm, or internal clock, which tends to follow daylight patterns. Most adults need at least 7 hours of ...

The fleet is headed by aircraft carrier USS Abraham Lincoln (file image) Donald Trump has warned Iran that "time is running out" to negotiate a deal on its nuclear programme following the steady build ...