We are told "the old ones are the best ones" – and some of the oldest jokes in history are still in use today. It’s worth going back a few thousand years to find out why.

No. It is a myth for mature trees but may work on very young trees with 1 to 3-inch diameters. In short, it depends. A high concentration of dissolved copper can kill trees.

New study suggests anal ventilation might one day help treat respiratory failure

Human civilization wouldn’t be where it is today if we hadn’t domesticated animals. Now researchers have discovered the first example of an animal domesticating another animal, with a fish species found to recruit shrimp to tend their algae farms.

What might Earth be like crowned with rings? Space and science- fiction illustrator Ron Miller created extraordinary images of how the sky might look if Earth possessed such rings.

Researchers discovered traces of a malignant form of cancer in a fossilized bone from an unearthed dinosaur that roamed the Earth over 70 million years ago.

Researchers from the University of Bristol found that deer see the predator as green because they are colourblind. Instead of seeing tigers as humans do (right) they see a green blur instead (left).

Life can be stressful and full of toil. To ease your tortured mind, we present to you some stunning photographs of clouds on Mars, recently taken by

Carcinogens like benzene, acetaldehyde found in scented laundry products, according to University of Washington researchers

Removal of the appendix reduced the risk of developing Parkinson’s disease, an analysis of nearly 1.7 million health records in Sweden suggests.

Learn about air pressure and how it affects the planet's weather. Find out how atmospheric pressure is measured with a barometer.

SANTA CLARITA, California—Cesar Millan crosses the road to meet me. Two pit bulls, a Chihuahua, and a Yorkshire terrier—named Junior, Taco, Alfie and Kaley Cuoko—follow. Off leash and at heel, the dogs are calm, almost languid. If Millan communicates with them, I do not notice.

Tim Flach wants us to look at animals the way we look at people. Not so much to humanize them, but to get humans to consider how they relate to animals.

13 Incredible Facts You NEED To Know About The Environment