Sentences with phrase «over tens of millions of years»

What imprints would this or other kinds of industrial activity from a long dead civilization leave over tens of millions of years?»

Under the most accepted scenario, planets form over tens of millions of years from the slow accretion of dust, rocks, and gas.

The results, published this week in the Journal of Biogeography, reveal temperature as a driving force behind the divergence of a major seafloor predator; globally, and over tens of millions of years of Earth's history.

«What we think of as the classic bird skeleton was pieced together gradually over tens of millions of years.

«Given this high rate of molecular evolution, the stable morphology of tuatara over tens of millions of years is remarkable,» the team writes in its report.

The erstwhile Africans, meanwhile, spread out into Europe, Asia, and North America, adapting over tens of millions of years to occupy habitats vacated by dinosaurs.

The study, published in the journal Current Biology, shows that the familiar anatomical features of birds — such as feathers, wings and wishbones — all first evolved piecemeal in their dinosaur ancestors over tens of millions of years.

The formation was laid down layer by layer over tens of millions of years as sediment was deposited on the bottom of a vast seaway known as the Cretaceous Western Interior Seaway.

The cyclic strengthening and weakening of ocean tides over tens of millions of years is likely linked to another, longer cycle: the formation of Earth's supercontinents every 400 to 600 million years, according a new study.

What imprints would this or other kinds of industrial activity from a long dead civilization leave over tens of millions of years?»

During the breakup of Rodinia, tens of thousands of kilometres of mid-ocean ridge were formed over tens of millions of years.

«If the moon was the result of a long series of impacts from objects each about a hundredth to a tenth of Earth's mass, over tens of millions of years, then why do Mars and Venus not have similar moons?»

Over tens of millions of years, these protoplanets would repeatedly pass the pair.

What imprints would this or other kinds of industrial activity from a long - dead civilisation leave over tens of millions of years?»