Who lives in the treetops? DNA-collecting drone provides insights

Squinting into the treetops won't reveal the tiny organisms up there. But these creatures leave clues, in the form of DNA, on the leaves and branches. Now, researchers report that they have developed a way to collect this genetic material: a drone with a specialized fabric probe. The team flew the drone above the rainforest and, based on DNA collected by the probe, identified the invertebrates in the canopy.