More than 280 people are still missing after a ferry carrying 462 people sank off South Korea.
Inventor James Dyson wants to use cyclone technology to rid the world's rivers and oceans of rubbish.
The finalists in the 11th annual Smithsonian Photo Contest have been announced, and you can help choose the winner.
Best photos of the day: 16 April 2014.
Best photos of the day: 15 April 2014.
Toxic cane toads have reached staggering numbers in Purnululu National Park, Western Australia.
Stanford University researchers construct geological history of Game of Thrones planet
Report finds natural-warming hypothesis can be ruled out with 99.9% confidence.
Firefighters battle deadly forest fires in Valparaiso, Chile for second night after coastal winds whipped up flames again.
7.5 magnitude earthquake beneath Indian Ocean triggers new warning.
Greenhouse gas emissions need to be slashed by up to 70% to avoid 4C-5C rise in temperatures, panel warns.
Artistic protest reflects dissatisfaction over air quality in China.
South Pacific nation struck by magnitude-7.3 earthquake off the island of Bougainville.
Best photos of the day: 11 April 2014.
ZSL's Edge birds danger list includes prehistoric-looking stork as tall as a human and an eagle
Half a million insects weighing 45kg settle on body of apiarist in record 'bee-bearding' bid
Best photos of the day: 10 April 2014.
Temperatures are predicted to soar above 20 degrees at the end of April and into May
Chinese eat less shark-fin soup as government cracks down on extravagance and green groups apply pressure
Best photos of the day: 9 April 2014.
Thawing permafrost is releasing huge quantities of greenhouse gases
Architects propose building smog-free bubble domes over parks in Beijing.
Syria facing a deepening food crisis three years into a devastating civil war
Renewable energy stocks have risen worldwide despite a drop in investments.
Volcanic island of Niijima has now completely taken over its neighbouring island Nishinoshima
Use of diesel cars has increased in UK as a consequence of government policy - a move scientists say should be reversed.
Arid ecosystems help mitigate the effects of climate change, scientists discover
Green energy is generating popularity in the UK, as Good Energy's latest results show
Leaked IPCC report says solar energy has the 'technical potential' to mitigate effects of climate change.
Police Scotland refuse to disclose type of poison used but RSPB said it is highly toxic and fast acting