A stunning image of a kingfisher diving into a river at such high speed that it seems to leave a motion trail behind it clinched the award for Spanish photographer Mario Cea.
At least 14 people died in Georgia storms on Sunday, while four were reported dead in Mississippi on Saturday.
Walsh and Jacques Piccard became the first humans to descend to full ocean depth in January 1960.
The more specific and targeted a 'psychological inoculation' is, the better it works, just like in medicine.
The reports come as at least four people were killed in southern Mississippi a day earlier.
The diver was bitten a number of times by a bull shark near the Great Barrier Reef.
Stating the facts is not an effective way of engaging with a science sceptic.
The government has upgraded the cold weather health alert across southern England from level-2 to level-3.
The structures were discovered near Birka, the first Viking town in Sweden.
Astronomer Stephen Kane analyses a potentially habitable planet just 14 light years away.
The astonishingly well-preserved mummy of the iceman reveals that he ate local goat before he died.
The extinction of ancient Australia's megafauna has been heatedly debated among scientists for years.
Ocean temperatures are similar to those in the last interglacial period, when sea levels were much higher.
Russia also expects a breakthrough in laser and electromagnetic weapons, Deputy Defence Minister Yuri Borisov said.
Features of gold jewellery found in the grave suggest a child found next to the woman was her daughter.
Rock art and pottery reflect the rise and fall of cattle grazing in the Gilf Kebir region.
The burial found in Western Scotland is one of the few ever discovered and documented outside Scandinavia.
CCTV footage captures the elephant calf being helped to stand by his mother and another family member.
The valleys allow more circulation of warmer water underneath the ice sheet, which could accelerate melting.
Josephine was nearly 50-years-old and suffered from a variety of health issues, zookeepers say they had no choice.
Limestone rock was found in same cave where eagle talon jewellery was discovered.
In seven billion years Earth will be destroyed by the Sun - but plenty of things could cause extinctions before that.
Since the 19th century, human activity has profoundly changed marine ecosystems and the role of megafauna in South America.
There are less than 60 vaquita porpoises left in the wild and it may be difficult to catch any to protect them.
Incoming US President Donald Trump had threatened to pull out of the deal, calling climate concerns a "hoax".
Baldenegro was known for his fight against illegal logging in the country's Sierra Madre mountain region.
Mount Tambora eruption of 1815 was the largest volcanic eruption in historical records.
Comparing the brains of Tasmanian tigers and Tasmanian devils, scientists find evidence of behavioural differences.
We are likely to lose the majority of primate species to extinction in the coming decades.
Evolution of the wet climate would have driven human population movements in and out of the Sahara.