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2017-08-08 16:33 | 来源:英语学习网站 | 编辑:学英语

Scientists studying a tiny sea snail have discovered that it swims using the same movements as flying insects. The so-called sea butterfly has two wing-like appendages, where most snails have a single foot. The BBC's Johnason Webb now reports. 织梦内容管理系统

The sea butterfly looks like a transparent, gelatinous snail, with slimy wings sprouting from the opening of its shell. But instead of using those appendages as paddles, like the most types of swimming plankton, this tiny animal genuinely appears to fly under water. Tracking its movement in minute detail, researchers found that the snail's wingtips trace out a figure of eight to generate lift, just like of those of an insect. It may not float, but the sea butterfly does apparently swim like a bee. dedecms.com

That's the BBC News.

copyright dedecms

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