Sentences with phrase «over tens of thousands of years humans»

Not exact matches

The idea that induced change to aplant's genetic code is a phenomenon of the DNA age is also untrue: modern hexaploid wheat possesses six times as many chromosomes as its prehistoric ancestor, thanks to tireless selection and breeding over ten thousand years of human farming.

Over ten thousand years ago our species discovered, and honoured, that nutrient dense plants were capable of sustaining human life.

It's now becoming clear, however, that human ancestors not only lived in the rainforest but transformed it over tens of thousands of years.

Because if some genius Neandertal invents a new kind of hand axe — and they used the same kind for so long, for tens and tens [of] thousands of years — but if somebody in the cave invents a new one, it's not going to spread beyond that cave probably, it might not even spread that much within the cave; it's [likely] to die with him; whereas the modern humans have this thing of watching each other and teaching other and spreading things among themselves among one another, so that 10,000 or so --[it] might have been a few more, I know that the people are not too clear about that might — there might only have been 10,000 Neandertals all over Europe.

«It is just about possible that over tens of thousands of years Neanderthals thought up a way of doing one thing — making these tools — that humans hadn't thought of before,» says Coolidge.

More recent studies, however, have found evidence of speedy evolutionary change in animals — as well as hundreds of changes in the human genome that appeared within tens of thousands, rather than over hundreds of thousands or even millions of years.

The microbiota, which evolved over tens of thousands of years alongside their human hosts, constitutes a complex and diverse community whose exact composition varies from person to person.

Layering astronomical time over human time, the resulting prints depict the cosmological phenomena recorded decades ago, which capture light that originally emanated from stars tens of thousands of years ago.

a) atmospheric CO2 from human activity is a major bause of observed warming in the 1980's and 1990's, c) that warming is overstated due to a number of factors including solar effects and measurement skew d) the data going back 150 years is of little reliability because it is clustered so heavily in northeast america and western europe rather than being global e) the global climate has been significantly shifting over the last thousand years, over the last ten thousand years, and over the last hundred thousand years; atmospheric CO2 levels did not drive those changes, and some of them were rapid.