Man evolved from marine worm

Man evolved from marine worm

Scientists from the UK and Canada in a hurry to expand the horizons of those who believe that man evolved from apes. Biologists have shown that our "older" ancestor was two-millimeter marine worm that inhabits the planet over 500 million years ago, reports Zee News.

Ancient human ancestor called Pikaia gracilens or just pikaia. Recent research scientists from the University of Cambridge put an end to the perennial debate biologists and paleontologists about what class of beings pikaia include: invertebrates and chordates. First fossils of an ancient animal, like a worm, have been discovered by the American scientist Charles Walcott in 1911 in British Columbia (Canada).

In pikaia had no teeth and eyes, despite the presence of the head, as well as tiny gills and two small tentacles, which, paleontologists believe marine animal used for the production of nutrients. After studying the remains of ancient creatures, the researchers first carried him to polychaete worms. Only in the mid-1970s, a group of Cambridge biologists have suggested that P. gracilens may refer to the chord. Ie vertebrates. Less than half a century, as these assumptions could be confirmed. To do this, the researchers examined the smallest details of the structure pikaia with the latest electron microscopes. The animal is able to detect small hryaschik or chord, performs the role of the spine, and even the remains of the circulatory system. Biologists believe that pikaia chord is the oldest organisms on Earth, and therefore, from the tiny sea creature came all vertebrate creatures on the planet, including birds, fish, amphibians, mammals and man ....

It is not clear why the spine began to develop during the evolution from pikaia. Paleontologists suggest that the chord is essentially needed then to quickly escape from larger predators.

See also:

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  • 26 facts about the human body.
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