纳米比亚甲虫的集水绝技启示人类抗旱
In the barren gravel plains of coastal Namibia, where rain falls only a few centimeters each year, a small black beetle has mastered the art of survival. The Namib Desert beetle, known as the fog-basking beetle, doesn’t wait for a downpour. Instead, it climbs to the top of a sand dune at dawn, lifts its shell into the heavy sea fog, and lets droplets of water roll down its back into its mouth. This remarkable adaptation has fascinated biologists for decades.
The beetle’s shell is covered in a clever pattern of bumps and waxy grooves. Microscopic bumps attract tiny water droplets from the fog, and when they grow large enough, the droplets slide down along waterproof channels straight to the beetle’s mouth. It collects enough water in a single morning to survive the scorching day. Researchers estimate that each beetle can harvest up to 40 percent of its body weight in water this way.
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