Don't miss: Watch Saturn shine and Halley’s Comet debris streak across the sky

Scientists found that prolonged fasting triggers major changes throughout the body, but many of the most interesting effects only appeared after about three days without food. The results suggest fasting may influence health in ways that go beyond weight loss and could eventually inspire treatments that mimic its effects.

NASA has selected the GIMLI project to investigate whether the Marius Hill Pit opens into a vast underground cave or lava tube. Using radar, seismic sensors, gravity measurements, and cameras, researchers will search beneath the lunar surface and estimate the size of any hidden void. Such caves could preserve clues to the Moon’s volcanic history and potentially provide protected shelters for future astronauts.

The students will head to Florida to compete against university teams from Australia, India and the US.

Wildlife cameraman Dan Abbot is caught off guard by a humpback whale, a rare sight in Welsh waters.