Despite President Trump's permit to proceed, the XL oil pipeline may never be completed.
The British-led effort to break the World Land Speed Record is delayed by cash-flow problems to 2018.
Researchers are warning of a "devastating" loss of coral at the Dongsha Atoll in the South China Sea.
Can an alpine wind really give you a headache?
Magnetisation mapped in Earth's rocky, outer shell
South Georgia's cautionary message for the Antarctic
How hackers could play havoc with our economies
Drawing creatures humans have never seen
The rapid spread of Australia's cane toads
Programmes, video and downloads: Solutions to air pollution from across the world
Quiz: Do you know enough music to win Pointless?