The Nasa tribe has long been caught in the crossfire between the Colombian government and the FARC. As fighting has increased in recent months, the tribe has asked both sides to leave its area.
Venezuela says it will cut off oil supplies. Others aren't being so hard line, writes guest blogger James Bosworth.
Lonesome George is believed to be the last of his subspecies, but he hardly had time for loneliness: The tortoise had constant company from journalists, scientists, and potential mates.
The remote, frozen Svalbard Global Seed Vault stores more than 740,000 sample of seeds that contain genetic treasures such as heat resistance, drought tolerance, or disease and pest resistance.