From wintry snowscapes and spring blossoms to summer thunderstorms and autumn colour. And back again...
So far, the rare footage of the shark has got over 368,000 views and 2,200 shares on Facebook.
Cory Iverson, 32, was an engineer with a state fire engine strike team based in San Diego and is survived by his pregnant wife and a two-year-old daughter.
Climate researchers compiling a report noticed something odd about the data coming from an Arctic weather station in America's northernmost city.
Loss of water from the mountains resulted in this change, according to researchers involved in the study.
'We could end up with 8 feet of sea level-rise in 2100, but we're not likely to have clear evidence for that by 2050,' say scientists.
Researchers believe that the ancient ice core may contain ice that was formed over 600,000 years ago – long before the appearance of modern humans.
Exceptions were made for the poorest countries as their access to energy is a clear benefit.
The researchers studied the evolution of the ice sheet over last 50 million years in the current study.
Industry will remain a focus of increasingly stringent decarbonisation policies as nations address their climate goals.
The hottest year in modern times experienced "multiple extreme events that weren't even possible without human influence".
Growing popularity of Greek staple generating huge volumes of food waste in the form of liquid whey, which scientists test for other uses.
Our 2017 gallery kicks off with Barack Obama shedding a tear and ends with his successor inflaming the Middle East.
Total value of reusable materials in discarded electronics was at least $55bn in 2016 - more than the GDP of most countries.
Museum of London to honour nauseating urban by-product that blocks sewers. Here are some of the worst fatbergs on camera. Warning: put down any food you have.
New Zealand has been rocked by a series of powerful earthquakes over the years.
Member nations have agreed to set quota limits.
Stunning wildlife, aerial, landscape and underwater photos in National Geographic's Nature Photographer of the Year contest.
Warming is causing wind farms to get less efficient in the amount of power they can generate and it is bound to get worse.
Wildfires, rising sea levels and droughts creating new challenges for city governments, report says.