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A book that has been missing from the Hereford school library in England has been returned - after 120 years.
Google announced it will get all its 2017 energy from solar and wind.
It's not often that a nature documentary tops the ratings.
It looks like we're moving closer to a dramatic break-up.
Switzerland is, as you'd expect, one of the countries with the cleanest energy.
What can go wrong when loudmouths spread fake information?
This is the end for London's dirty buses.
As the Antarctic spring comes to an end and the "summer" enters into force, a team of geoscientists is seeking 1.5-million-year ice.
A sight to behold.
In times of political turmoil, academics are often the first to react.
When one door closes, another one opens.
When Emma Morano was born, Umberto I was still reigning over Italy.
They're leapfrogging developed countries.
Which one are you?
An important move for protecting wildlife and the environment.
Some simple questions have deceivingly complicated answers.
Stop what you're doing and watch this incredible footage. Your life will not be the same again.
F.D.C. Willard, also known as Chester, is a cat who co-authored a high-quality physics paper in 1975
Modern technology is impressive, extremely useful, and sometimes a bit disturbing.
They mess up your brain, and they mess up your body.
We've only seen the tip of the surface.
Cutting down on meat could drastically reduce global warming.
Archaeologists have discovered a gigantic, 1,500-year-old stone monument in Kazakhstan.
Storing CO2 underground might be one pivotal for our climate future.
Spectacular images of an uncontacted tribe in the Amazon have emerged, but conservationists and indigenous populations fear that the villagers are in grave danger.
Complicated physics, impossible results.
Blue penguins were facing a perilous transit to their nests, so a New Zealand city decided to build an underpass to protect them.
Things are already bad.
Filmmaker Samuel Orr took 40,000 still images from his front window in a forest cabin to show how nature changes day by day.
This might make a big difference in the future.
Things are not looking good in the North Pole.
Unprecedented levels of smog pollution in Iran's capital have killed over 400 people.
Bad Australia, bad!
China is schooling the US on climate change. What a time to be alive.
"We are not on the right track and we need to deal with that."
Let's face it: the war on drugs has failed.
Over 360 multinationals and investing groups have published an open letter to president-elect Donald Trump.
A heartfelt plea, sometimes said with a breaking voice.
Biologists have located the world's tallest tropical tree, a 94.1-metre (309-foot) specimen in Borneo. I
It was repaired in less than a week.
Your drinking could even affect the future generation.
Everything you touch leaves behind a trace.
We need leaders that address global issues.
According to data published by the World Meteorological Organization (WMO) and the UN, 2016 will be the hottest year on record.
Dinosaurs ruled the Earth for millions of years, but they took it slowly.
Heartwarming.
Just because they enjoy the opposite sex doesn't mean they're bad dads.
The thorny devil can't drink water the "normal" way.
It takes 2 hours to take a bus from Dubai to Abu Dhabi. It's a 90-minute drive. The Hyperloop could get you there in 12 minutes.
Researchers have observed something which had been proposed for a long time.
