What DNA Revealed About The Giant Squid Is Extremely Rare скачать в хорошем качестве

What DNA Revealed About The Giant Squid Is Extremely Rare

The giant squid is one of the largest animals on Earth. It can stretch over 43 feet long, has the biggest eyes of any living creature, and carries the largest brain of any invertebrate. Humanity didn't photograph one alive until 2004. We didn't film one in its natural habitat until 2012. And we've never kept one alive in captivity. But when scientists at the University of Copenhagen finally decoded DNA from 43 giant squid specimens collected from every ocean on the planet, the results defied everything biologists expected. The genetic diversity was more than 20 times lower than other squid species. There was no population structure. A specimen from Japan was genetically identical to one from Florida. Every giant squid on Earth turned out to be one species, one global family, sharing a single gene pool. Then in 2020, a team of over 30 researchers published the first full genome: 2.7 billion DNA base pairs, roughly 90% the size of the human genome. Inside it they found over 135 brain-wiring genes that were thought to only exist in vertebrates, a unique camouflage gene family found nowhere else in the animal kingdom, and a mystery: the genetic trick vertebrates used to grow large was completely absent. The giant squid got enormous through some mechanism science hasn't identified yet. This video traces the genetic story of the Kraken, from sailor myths to molecular biology, and reveals what DNA uncovered about an animal we still barely understand. Topics covered: giant squid DNA, Architeuthis dux genetics, giant squid genome, giant squid one species, cephalopod evolution, protocadherin genes invertebrate, giant squid low genetic diversity, Kraken mythology science, deep sea biology, sperm whale giant squid, marine biology documentary, ocean exploration.