Surprisingly little is known about the sea floor in great detail, prompting countries the world over to scour the seabed to see what they can find. Will this change our security landscape?
Footage shared on social media shows two demonstrators being pulled from the top of a Tube train by a crowd of angry commuters, with a transport worker stepping in to shield an activist.
Experts say humanity has only 10 years to have large-scale carbon dioxide reduction schemes up and running if global warming is to be restrained to 1.5 degrees Celsius. Here are some of the schemes that are being explored….