British climber Tim Mosedale said climbers would find it 'tricky to negotiate' the last step of Mount Everest.
The waves of the Southern Ocean have gone largely uncharted – turns out they're huge.
The magma is being tapped by plumes and could resurface at Hawaii, Yellowstone or the Galapagos.
Nitrogen dioxide and PM 2.5 were both linked to a much greater chance of poor sleep.
A British mountaineer believes Everest may now be "tricky to negotiate".
The seeds are safe for now but the melting of permafrost is alarming.
Bushland that nearly 180 koalas could have inhabited has been destroyed within two years.
Life on Earth faced its first big challenge 444 million years ago.
Moss banks survive freezing over the harsh winters, and have started growing more rapidly in the summers.
Rising sea levels means higher waves and tides, which adds up to much more frequent flooding.
The US and former Soviet Union were mainly responsible for the consequences.
World Meteorological Organisation declares 1970 cyclone in Bangladesh worst ever.
In some areas of Colombia, water levels were waist deep and some residents had to resort to travelling along streets on their canoes.
'Narco-deforestation' has boomed in the region as the trade has been pushed out of Mexico and the Caribbean.
The iconic species is set to go extinct on the Otago peninsula as soon as the 2040s.
The vaquita is on the verge of extinction – there are believed to be fewer than 30 in existence today.
They're made from algae and tea bags – and will be on sale in the US within a year
Plastic debris included fishing gear, baby dummies and toothbrushes.
The footage sees the water turn red as the shark is killed.
The volcano is located close to Naples where more than a million people live.
Government working to contain crop-eating caterpillar that arrived for the first time in Africa in 2016.
Environmentalists believe the reef, more 1,000 kilometres long and dotted with brightly coloured coral, may be home to new marine species.
The 15metre-long carcass was first spotted by a local resident on Seram Island in Maluku province.
The five-year-old orangutan was held captive in a cage before her rescue.
Native Americans claim 84-gallon spill proves pipeline is environmental hazard.
The new discovery indicates that microbial life existed in hot springs far earlier than previously known.
Chinese president's comments come amid growing concerns that the Trump administration could withdraw from the deal.
Multiple sharks have been added to the list to help protect the creatures.
The sharks were spotted 50ft from Long Beach.
President Tump and EPA chief Scott Pruitt are making the changes for 'regulatory certainty'.