Sentences with phrase «such ocean venting»

AB: Since many astrobiologists are currently examining hydrothermal vents, in search of extremophiles, does the prebiotic chemistry actually get decomposed rather than enhanced by the presence of such ocean venting?

Not exact matches

Such vents line the midocean ridges, where magma wells up to form new ocean crust.

A study described here today at the American Geophysical Union's biennial Ocean Sciences Meeting shows that RNA's chemical building blocks fall apart within days to years at temperatures near boiling — a finding that poses problems for some origin of life theories, especially ones picturing that life arose in scalding settings such as deep - sea hydrothermal vents.

Each contained jumbles of DNA sequences collected from environments such as soil, the ocean, hydrothermal vents, industrial effluent, and cow and baboon faeces.

Now, new research offers a potential solution: Longer RNA chains could have hidden out in porous rocks near volcanic sites such as hydrothermal ocean vents, where unique temperature conditions might have helped complex organisms evolve.

Earthly life has proved remarkably hardy in similar extreme environments such as hydrothermal vents on the ocean floor and polar ice.

Although the evidence was subsequently contested, some single - celled microbial life lacking a nucleus that segregates their internal DNA or RNA («prokaryotes») from the surrounding cytoplasm may have flourished in darkness within cracks in Earth's seafloor crust and around deep, warm or boiling hot ocean springs (hydrothermal or volcanic vents, such as at Lost City or at black smokers) without a need for light or free oxygen in the oceans or atmosphere.

Such primal organisms already thrive deep in Earth's ocean near geothermal vents.

Scientists have discovered unusual hot water vents at the bottom of the Atlantic Ocean, such as this stone chimney rising three stories above the sea floor.

(In the open ocean, such seafloor vents support a broad range of complex organisms — including worms and more — despite a total lack of sunlight.)

Microorganisms dominate all other life everywhere scientists have looked, including the human body, the Earth's soils and sediments, the oceans and fresh waterways, the atmosphere and even extreme environments such as hydrothermal vents and subglacial lakes.

You will recall that hydrothermal vents are plumes of hot water that spew from rocks and cracks along the ocean floor, especially in regions of sea - floor spreading, such as oceanic ridges and rift valleys.

(singular: archaeon) a group of tiny organisms often living in extreme environments, such as ocean vents and salt lakes.

Unlike hydrothermal vents, however, we know CO2 has been increasing, we know it causes warming, we know the oceans have been warming in a way that you could expect with such a forcing.

Exploration of deep - sea hydrothermal vents in other sectors of the Southern Ocean, such as the Pacific - Antarctic Ridge [16], are likely to reveal further chemosynthetic communities.

However, the conditions predicted for the open ocean may not reflect the future conditions in the coastal zone, where many of these organisms live (Hendriks et al. 2010a, b; Hofmann et al. 2011; Kelly and Hofmann 2012), and results derived from changes in pH in coastal ecosystems often include processes other than OA, such as emissions from volcanic vents, eutrophication, upwelling and long - term changes in the geological cycle of CO2, which commonly involve simultaneous changes in other key factors affecting the performance of calcifiers, thereby confounding the response expected from OA by anthropogenic CO2 alone.