Sentences with phrase «by organisms billions»

Any methane produced by organisms billions of years ago could be buried deep in the planet and periodically disturbed and vented to the surface through cracks, said mission scientist Sushil Atreya of the University of Michigan.

Not exact matches

Each one of these billions of plastic items can be ingested by organisms and have negative effects on their health.»

Chemical analysis of even older rocks suggests that photosynthetic organisms were already well established on Earth by 3.7 billion years ago.

Scientists think that mitochondria were once independent single - celled organisms until, more than a billion years ago, they were swallowed by larger cells.

The oceans of around 1 billion years ago, the researchers argue, were topped by a thin oxygenated layer populated with photosynthetic organisms and heterotrophic bacteria.

Contained within all eukaryotic cells, mitochondria possess their own DNA due to their evolutionary history as an «enslaved» bacterium swallowed up billions of years ago by a primitive eukaryotic organism.

Before 2.3 billion years ago, there was little oxygen in the atmosphere but plenty of dissolved iron and many organisms like bacteria derived energy by metabolizing the metal.

The 2.52 billion - year - old sulfur - oxidizing bacteria are described by Czaja as exceptionally large, spherical - shaped, smooth - walled microscopic structures much larger than most modern bacteria, but similar to some modern single - celled organisms that live in deepwater sulfur - rich ocean settings today, where even now there are almost no traces of oxygen.

These organelles originated more than a billion years ago as single - celled organisms that were swallowed by larger cells.

Water that is 1.5 to 2.6 billion years old is a time capsule from the Precambrian — a period when life was dominated by single - celled organisms.

Kombucha tea is a fermented tea (naturally effervescent) that contains billions of friendly gut organisms (probiotics) that help to strengthen your immune system by bolstering your levels of good organisms in your gut, which provides a first level of defense against pathogens from things you ingest.

Each Multi-Probiotic 4000 capsule, provided by Douglas Laboratories, contains over four billion beneficial organisms, including representatives of both the lactobacillus and bifidobacterium genera, mixed in a base of prebiotic fructooligosaccharide.

We have an unknown climate sensitivity which has some how kept life on earth going for 2 billion years through extremes but is now going to roll over and die because of a little Co2 burp by an organism that has only been around 100,000 years.

Three and a half billion years ago our planet was quite different and Earth's earliest biosphere was dominated by microbial communities - complex multicellular organisms were not to evolve for quite some time, only arriving on the scene about 600 million years ago.

The Earth revolves around the Sun; organisms, including the Great Apes, evolve by natural selection; the Earth is billions of years old; the tectonic plates of the Earth are in constant motion; humans adding CO2 to the atmosphere now warms the climate more quickly than natural cycles do.