One-fifth of Earth’s ocean floor is now mapped
This leaves four-fifths - twice the area of Mars - still to be surveyed to a modern standard.
Author Archives: BBC News - Science & Environment
Mariana Trench: Don Walsh’s son repeats historic ocean dive
Sixty years after his father did it first, Kelly Walsh dives to the deepest point in Earth's oceans.
Greta Thunberg: Climate change ‘as urgent’ as coronavirus
Greta Thunberg says the world needs to treat climate change with similar urgency to Covid-19.