Menu Close

Environment + Energy – Articles, Analysis, Comment

Displaying 2901 - 2925 of 7446 articles

The short answer is that leaves fall off trees when they aren’t doing their job any more. Emily Nunell/The Conversation CC-NY-BD

Curious Kids: why do leaves fall off trees?

Leaves fall off trees when they aren’t doing their job any more. If there isn’t enough water, the leaf can be damaged and stop working.
It’s true they do have an amazing ability to be able to sleep standing up. But they do also sleep lying down. If you’re a horse, you need to be able to do both. Flickr/Loco Steve

Curious Kids: why don’t horses sit or lie down even while sleeping?

Horses can stand on three legs and rest the other leg. They can change the leg they rest so that all of their legs get a chance to have a break.
Days of protest by Extinction Rebellion have brought parts of London to a standstill. Shutterstock

UK becomes first country to declare a ‘climate emergency’

The move has been likened to putting the country on a “war footing”, with climate and the environment at the very centre of all government policy, rather than being on the fringe of political decisions.