Marco Magrini

The world’s oceans absorbed an additional 23 zettajoules of energy in 2025 alone. Image: Shutterstock By A few months ago, a team of scientists from the Chinese Academy of Sciences published a study carrying an unfathomable figure. In 2025 alone, they revealed, the world’s oceans absorbed an additional 23 zettajoules of heat energy. One joule is a unit of energy equal to one 3,600th of a watt-hour. But 23 zettajoules is beyond human comprehension.

Published in the UK since 1935, Geographical is the official magazine of the Royal Geographical Society (with IBG). Informative, authoritative and educational, this site’s content covers a wide range of subject areas, including geography, culture, wildlife and exploration, illustrated with superb photography. Click Here for SUBSCRIPTION details Want to access Geographical on your tablet or smartphone? Press the Apple, Android or PC/Mac image below to download the app for your device

SpaceX has announced it will strive to build a Mars city in approximately five to seven years. Image: Shutterstock By And so Elon Musk, the world’s visionary-in-chief, has finally rescheduled his planetary colonisation plans. Abandoning his 2014 prediction of reaching Mars by 2026, Musk now suggests his SpaceX company will establish a human base on the Moon within the next decade.