US president Donald Trump speaks during an Oval Office announcement  at the White House in Washington, DC. Photograph: Alex Wong/Getty Images

US president Donald Trump has defended his decision to part ways with national security adviser John Bolton, telling reporters that the hawkish defenc(...)

3-D image of the hole in the ozone layer high above Antarctica (above).  Photograph: Nasa

The mysterious surge in emissions of an illegal ozone-destroying chemical has been tracked down to illegal manufacturers of plastic insulating foam in(...)

Kathryn Sullivan: the scientist was undersecretary of commerce for oceans and atmosphere. Photograph: Steven Voss

The Trump administration’s attempts to cut research budgets are “sending the wrong signal” to young scientists of the future, a former US presidential(...)

The bottom line is that painful joints and sore backs may very well be unreliable forecasters. Photograph: Getty

The association between aches and pains and damp weather is all in the mind, doctors have concluded. For millennia people have been blaming the rain (...)

Without action on climate change experts believe polar bears will  disappear from much of the Arctic. Photograph: Josh Haner/ New York Times

Climate change continues to advance, with new data from two US government research bodies declaring 2016 to have been the hottest year on record. Thi(...)

Governor of West Virginia Earl Ray Tomblin: “Ireland has done a great job in setting competitive prices and we’re trying to do more of that.” Photograph: Jim Stem/Bloomberg

Donald Trump has made plenty of outlandish promises during the US presidential campaign. A vow to bring back coal mining jobs to West Virginia might n(...)

Residents expressed concern about the effect on tourism along the Wild Atlantic Way, and the noise and effect on marine life

Living on an island shaped by some of the most turbocharged waves in western Europe, what’s not to like about ocean energy ? That was a question pu(...)

Casper, ‘probably a new genus of octopus’

When American scientists accidentally filmed a marine being they nicknamed Casper during research off Hawaii earlier this year, one of the first expe(...)

Tommy Furey of the Marine Institute onboard the Celtic Explorer with maps of mountains in the Atlantic Ocean. Ireland is leading the world in deep-sea mapping. Photograph: Andrew Downes/XPOSURE

The Earth’s oceans cover about 70 per cent of the surface of the planet. Human beings have explored only 10 per cent. The deepest oceans are largel(...)

Dr Dick Feely, senior scientist with the US National Oceanic and Atmospheric Administration.

A global expert on ocean acidification has urged Ireland to become involved in monitoring its potential impact on the State’s multimillion-euro seaf(...)

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