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News articles about "Isotopes"

Dust in the wind drove iron fertilization during ice age

Researchers from Princeton University and the Swiss Federal Institute of Technology in Zurich have confirmed that during the last ice age iron fertilization caused plankton to thrive in a region of the Southern Ocean The ... - Read More

Why did humans replace Neanderthals? Paleo diet didn't change, the climate did

Why were Neanderthals replaced by anatomically modern humans around 40 000 years ago One popular hypothesis states that a broader dietary spectrum of modern humans gave them a competitive advantage on Neanderthals Geochemical analyses of ... - Read More

Organic chemical origins in hydrothermal systems

Organic, organic, Organic
Serpentinite hosted hydrothermal systems have been suggested as likely sites for the formation of organic compounds in the abiotic conditions of early Earth that is in the absence of living organisms Such compounds were likely ... - Read More

Water cycle amplifies abrupt climate change

During the abrupt cooling at the onset of the so called Younger Dryas period 12680 years ago changes in the water cycle were the main drivers of widespread environmental change in western Europe Thus the ... - Read More

Ways of the photoelectric effect; How physicists have learned how to select them

In contrast to its apparent simplicity that brought Einstein his Nobel Prize the photoelectric effect when an electron is knocked out from its parent atom by a photon is quite complicated to analyze in general ... - Read More

Deep-sea corals record dramatic long-term shift in Pacific Ocean ecosystem

sea
Long lived deep sea corals preserve evidence of a major shift in the open Pacific Ocean ecosystem since around 1850 according to a study by researchers at the University of California Santa Cruz The findings ... - Read More

Amber provides new insights into the evolution of Earth's atmosphere: Low oxygen levels for dinosaurs

Oxygen
An international team of researchers led by Ralf Tappert University of Innsbruck reconstructed the composition of Earth's atmosphere of the last 220 million years by analyzing modern and fossil plant resins The results suggest that ... - Read More

Breaking Bad's Addictive Chemistry

and a huge part of the show’s appeal As Pinkman exclaims during an episode of the show’s first season “Yeah Science ” Permalink to this article Comment Share ... - Read More

Tapping a valuable resource or invading the environment? Research examines the start of fracking in Ohio

Environment
A new study is examining methane and other components in groundwater wells in advance of drilling for shale gas that's expected over the next several years in an Ohio region Amy Townsend Small a University ... - Read More

Late Cretaceous Period was likely ice-free

Ice
For years scientists have thought that a continental ice sheet formed during the Late Cretaceous Period more than 90 million years ago when the climate was much warmer than it is today Now a University ... - Read More

Ocean fish acquire more mercury at depth

fish, Mercury
Mercury a common industrial toxin is carried through the atmosphere before settling on the ocean and entering the marine food web Now exciting new research from the University of Michigan and the University of Hawai'i ... - Read More

Rocks can restore our climate ... after 300,000 years

A study of a global warming event that happened 93 million years ago suggests that the Earth can recover from high carbon dioxide emissions faster than thought but that this process takes around 300 000 ... - Read More

Cosmochemist May Have Solved Meteorite Mystery

in the cores of the olivine crystals embedded within the chondrules When olivine crystallizes from a liquid of chondrule composition at temperatures of approximately 2 000 degrees Kelvin 3 140 degrees Fahrenheit most sodium remains ... - Read More

Laser system allows determination of atomic binding energy of the rarest element on Earth

Atomic, System
The radioactive element astatine the name of which is derived from the Greek word for 'instability ' is so rare on Earth that it has not yet been investigated to any greater extent and as ... - Read More

Noble gases hitch a ride on hydrous minerals

Minerals, Minerals
The six noble gases do not normally dissolve into minerals leaving earth scientists to wonder how they are subducted back into the Earth Researchers at Brown have discovered that the lattice structure of minerals such ... - Read More

Fossil kangaroo teeth reveal mosaic of Pliocene ecosystems in Queensland

The teeth of a kangaroo and other extinct marsupials reveal that southeastern Queensland 2.5 5 million years ago was a mosaic of tropical forests wetlands and grasslands and much less arid than previously thought The ... - Read More

Ancient trapped water explains Earth's first ice age

Ice
Tiny bubbles of water found in quartz grains in Australia may hold the key to understanding what caused Earth's first ice age say scientists The Anglo French study published in the journal Nature analysed the ... - Read More

Ancient trapped water explains Earth’s first ice age

Ice
Tiny bubbles of water found in quartz grains in Australia may hold the key to understanding what caused Earth's first ice age say scientists The Anglo French study published in the journal Nature analysed the ... - Read More

Diet likely changed game for some hominids 3.5 million years ago

Carbon, carbon
A new look at the diets of ancient African hominids shows a game changer occurred about 3.5 million years ago when some members added grasses or sedges to their menus according to a new study ... - Read More

Acceleration of ocean denitrification during deglaciation documented

As ice sheets melted during the deglaciation of the last ice age and global oceans warmed oceanic oxygen levels decreased and denitrification accelerated by 30 to 120 percent a new international study shows creating oxygen ... - Read More
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