Jonas Kryspin🇨🇿

Kolik je tady rozhořčených komentářů a přitom by řešení bylo tak snadné. Servat z něho ten mundůr a ještě mu na cestu dát pár kopanců. Proč pořád nechávat všechno na stát? To tady není žádný potomek popravených Schutzhäftling, který by se toho ujal???

Scientists slipped a single human gene into monkey fetuses… and the monkeys grew bigger, more human-like brains. Not a metaphor. Not a simulation. Actual enlarged brains with the wrinkled folds that separate us from every other primate on Earth. The gene is called ARHGAP11B. It exists only in humans. And researchers at Germany's Max Planck Institute teamed up with Japan's Central Institute for Experimental Animals and Keio University to inject it into common marmoset fetuses. The result? A bigger neocortex. More neurons. A folded surface that mimics the human brain. Here's the wild part. That gene didn't appear by design. It showed up around 5 million years ago through a copy-paste error in our DNA. One nucleotide swapped places. 55 nucleotides got dropped. Suddenly our ancestors had a gene that told brain stem cells to keep multiplying way longer than usual. That single glitch may be the reason you can read this sentence. The team pulled the fetuses out by C-section at 101 days, roughly 50 days before birth. Letting them be born was off the table. Lead researcher Wieland Huttner called it ethically mandatory to stop there, because nobody knows what kind of behavioural change a marmoset with a human-sized brain would actually display. Think about that line for a second. The neocortex handles reasoning, language, abstract thought, everything that makes humans, well, human. It's three times larger in us than in chimpanzees. And we just proved that one human gene is enough to push another primate's brain in our direction. We are now editing the cognitive boundary between species. Source: Heide et al., published in Science, Max Planck Institute of Molecular Cell Biology and Genetics

Plzeň Borská přehrada 10 mláďat foto-Karel Makoň, DESOP