monkeys

Bouvier's red colobus monkey — thought to have disappeared for good from the forests of the Democratic Republic of Congo sometime in the 1970s — has been photographed by two researchers.

The surging and virulent strain is carried by macaques in southeast Asia. As their habitat is disrupted by development, the monkeys come in closer contact with people. And mosquitoes do the rest.

How is a rare strain of malaria spreading near cities in Southeast Asia? That's the question that's been puzzling a team of scientists. And they're using drones to find the answer.