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Early life may have lived very differently than life today
As two rovers scour Mars for signs of water and the precursors of life, geochemists have uncovered evidence that Earth’s ancient oceans were much different from today’s. The research, published in this week’s issue of the journal Science, cites new data that shows that Earth’s life-giving oceans contained less oxygen than today’s and could have been nearly devoid of oxygen for a billion years longer than previously thought. T
Certain ions bouncing around on the ocean’s surface and in droplets formed by waves may play a role in increasing ozone levels in the air we breathe, new research suggests.
These ions cover the surface of the sea in an ultra-thin blanket – about one-millionth the thickness of a sheet of paper. Researchers call this region the “interface.”
Using a technique that employs highly accurate laser beams, chemists for the first time saw the actual structures formed by these halo
Fossilised remains of sea creatures are commonly found in rocks in the mountains of the Basque Country. So, at some time in the past, Euskal Herria was under the sea. For example, during the Palaeocene period, some 65-55 million years ago. The region was then subtropical, and similar in appearance to the Australian Coral Reef.
Along the Bizkaia and Gipuzkoa coast, around Eibar, in Irati and in Urbasa, for example, we can see Palaeocene outcrops at the surface. During that period there were
Salmon farms in British Columbia may pose a threat to wild salmon stocks, a paper published today in the Canadian Journal of Fisheries and Aquatic Sciences claims. The paper presents evidence that native fish sampled near the farms are more heavily infected with parasitic sea lice. Lead author Alexandra Morton, a registered professional biologist and private researcher, believes the parasites multiply on the farms and are then transmitted to juvenile native salmon, causing recent drastic declines in
Locked in Arctic Soils Into the Ocean, Researchers Say The Arctic Ocean receives about ten percent of Earth’s river water and with it some 25 teragrams [28 million tons] per year of dissolved organic carbon that had been held in far northern bogs and other soils. Scientists had not known the age of the carbon that reaches the ocean: was it recently derived from contemporary plant material, or had it been locked in soils for hundreds or thousands of years and therefore not part of
Period was previously thought to be ice-free
Arlington, Va.-Scientists using cores drilled from the New Jersey coastal plain have found that ice sheets likely caused massive sea level change during the Late Cretaceous Period -an interval previously thought to be ice-free. The scientists, who will publish their results in the March-April issue of the Geological Society of America (GSA) Bulletin, assert that either ice sheets grew and decayed in that greenhouse world or our understandin