Sentences with phrase «early oceans»

Complex processes that support all life have been serendipitously spotted with no cells needed, hinting that life could have started spontaneously in early oceans

From the Mars - size object that slammed into our planet 4.5 billion years ago, forming the moon, to a bombardment that boiled off early oceans as recently as 2.5 billion years ago, Earth has taken some massive stonings in its lifetime.

«The evidence for early oceans on Mars is controversial, and this question hits on a pretty fundamental issue,» says Science News astronomy writer Lisa Grossman.

But also that in the very early oceans, arsenic co-varied with the rise of atmospheric oxygen and coincided with the coming and going of global glaciations.

As a result, the planet's early ocean evaporated, water - vapor molecules were broken apart by ultraviolet radiation, and hydrogen escaped to space.

The earth's early oceans initially contained little oxygen, but cyanobacteria produce it as a by - product of photosynthesis.

According to Muehlenbachs, rocks that formed in early oceans should reflect this excess if comets or meteorites contributed more than 5 to 10 per cent of the water in the primordial oceans.

For instance, I ate one of my favorite lobster rolls last summer on a spotless, fresh - blown Maine day, boating up the coast from my home in Portland to French Island, where we anchored and swam in the bracing ocean, then carried on for lunch at Dolphin Marina in Harpswell (the roll there was a top - loading hot dog bun, buttered and toasted, lobster meat lightly mayoed, reconjuring an earlier ocean gulp).

It was not until 1990 and the discovery of an old tin containing hundreds of black and white photos from the early Ocean Island days that the reality of what they had spoken of finally came to life.

Yoshihiro Furukawa at Tohoku University in Sendai, Japan, and colleagues used a high - velocity propellant gun to simulate the impacts of ordinary carbon - containing chondrite meteorites — the most common type of meteorite — into the early ocean.

Zinc was rare in the early oceans, while iron and nickel were more common, so Milner - White wants to know if they could also help the amyloids form.

«Fortunately, some bacteria in the early oceans were able to separate water into hydrogen and oxygen.»

They found that soluble iron in the earliest oceans quickly combined with oxygen to form rust — forming reactive oxygen molecules, which damage biological tissue and make the cyananobacteria grow more slowly and produce less oxygen.

Debris left over from the solar system's creation regularly slammed into Earth, boiling away the early ocean and coating the planet with molten rock.

There are many indications that the photosynthesizing bacteria lived in these early oceans and oxidized iron.

Russell and his co-authors describe how the interactions between the earliest oceans and alkaline hydrothermal fluids likely produced acetate (comparable to vinegar).

Although scientists have theorized that Earth's early oceans of magma were two - layered, the new results are the first solid evidence to bolster that notion.

Scientists have long wondered if the moon's vast subsurface ocean, sandwiched between a rocky mantle and a global sheet of ice, could prove as habitable as Earth's early oceans.

In 2015, Russell and his collaborators showed that a vent surrounded by an approximation of Earth's early ocean could link RNA molecules into a two - part strand, and Barge says they will soon release more results.

The early ocean known as Arabia (left, blue) would have looked like this when it formed 4 billion years ago on Mars, while the Deuteronilus ocean, about 3.6 billion years old, had a smaller shoreline.

The volume of Mars» early ocean must have been at least 20 million km3.

Another flask below provided a miniature pond of water, as the model for an early ocean.

My research addresses the chemical development of the early oceans and atmosphere, the environmental context of early animal evolution, and the geologic factors that regulate sedimentary basins.

It was not until 1990 and the discovery of an old tin containing hundreds of black and white photos from the early Ocean Island days that the reality of what they had spoken of finally came to life.