Mostrar mensagens com a etiqueta China. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta China. Mostrar todas as mensagens

terça-feira, 4 de dezembro de 2018

Manipulação genética de...

... embriões:
https://www.jn.pt/mundo/interior/o-que-e-feito-do-frankenstein-chines-que-tera-alterado-do-adn-de-bebes-10272836.html

Citando:
"(...) explicou ter recorrido à técnica CRISPR/Cas9, para alterar o genoma dos dois embriões, de forma a torná-los resistentes a eventuais infeções pelo VIH. A experiência foi, segundo He, um sucesso, uma vez que as irmãs nasceram no início de novembro "normais e saudáveis". O objetivo, reforçou, não passa por criar bebés "mais inteligentes, mudar a cor dos olhos ou a aparência", mas, sim, "curar uma doença"."

segunda-feira, 12 de março de 2018

Mapa de possíveis zonas de queda da Estação Espacial Chinesa...

E Portugal está na zona...
https://www.jn.pt/mundo/interior/portugal-na-zona-de-maior-probabilidade-para-queda-de-estacao-espacial-chinesa-9174906.html

quarta-feira, 12 de julho de 2017

sábado, 4 de março de 2017

quarta-feira, 1 de fevereiro de 2017

O nosso antepassado comum?

Tanta coisa e afinal o nosso antepassado comum media menos de 1mm e era um emoticon:
http://www.history.com/news/youll-never-guess-what-our-oldest-known-ancestor-looked-like
Citando:
"Meet Saccorhytus coronaries, the species that scientists in a new study believe is the earliest known step on the evolutionary path that led to fish and—eventually—to humans.

An international team of scientists uncovered the microfossils of the speck-size creature they are calling Saccorhytus coronaries in Shaanxi Province, central China. According to their findings, published this week in the journal Nature, Saccorhytus lived 540 million years ago, during the early Cambrian period, when a shallow ocean would have covered the region where it was found. At that advanced age, it is believed to be the oldest known member of a category of animals known as “deuterostomes,” which are common ancestors to a wide range of other species, from starfish, sea urchins and acorn worms to the large group classified as vertebrates (backboned animals)."

terça-feira, 24 de maio de 2016

Fóssil novo e extinções em massa

http://www.bbc.com/news/science-environment-36333459
Citando:
" The specimen suggests marine reptiles evolved quickly after the event.
Previous evidence has suggested it took a long time for animals in the seas to bounce back."

quarta-feira, 18 de maio de 2016

Complex organisms emerged on Earth a billion years earlier than previously believed | Daily Mail Online

Complex organisms emerged on Earth a billion years earlier than previously believed | Daily Mail Online



Citando:

"1.56 billion year-old fossils from China were multi-cellular organisms
Four distinct shapes of eukaryotes were found in mudstone deposits
Researchers think they probably used photosynthesis for energy"

"WHAT IS EUKARYOTIC LIFE?
Every complex organism living on the Earth is made of eurkaryotic cells from plants to animals and even fungi.
These cells have genetic material that is bound within a membrane along with other organelles such as mitochondria or chloroplasts.
They are thought to have first emerged on Earth when prokaryotic cells such as bacteria began incorporating other cells into them.
They were thought to have first emerged between 1.6 billion and 2.1 billion years ago but may not have started forming complex organisms until much later."