A strong earthquake that hit Mexico City and other central areas has killed at least 273 people, officials say. Search teams are working feverishly to find any survivors who were trapped.
Scientists have created an electronic wafer that reprogrammed damaged skin cells on a mouse's leg to grow new blood vessels and help a wound heal.
A man in his 40s has died after attempting to swim the English Channel. Douglas Waymark is understood to have got into difficulty while taking part in a gruelling triathlon.
Government and aid agencies scale up efforts as hospitals overflow with patients, with dengue cases topping 100,000.
The Ebola virus is a member of the Filoviridae family of RNA viruses. It causes an often fatal disease in humans called Ebola hemorrhagic fever.
A new 'scorpion-milking' robot has been built to extract venom faster and more safely than ever before.
A generic drug that's used to treat type 2 diabetes could help people live longer, healthier lives. Metformin, a drug that's been approved in the US for decades, is typically taken as a pill every day by people with diabetes.