Molecular clock dates for the first animals to walk the Earth don't match the fossil record. Comparing the disparate DNA of two different species and extrapolating how long it would take for them to mutate from a common ancestor ...
A team of researchers from Columbia University has found that radiation levels from atomic testing in the Marshall Islands are still too high for human habitation. In their paper published in Proceedings of the National Academy ...
(Phys.org)—A new study shows that plant-consuming microorganisms that reside in coalbeds can convert plant carbohydrates into natural gas, potentially offering a sustainable, clean method of energy generation.
It's well-known that lightning is an electric current—a quick, powerful burst of charge that flows within a cloud or between a cloud and the ground. But surprisingly, scientists still don't fully understand how the initial ...
(Phys.org) —In the hunt for early life, geobiologists seek evidence of ancient microbes in the form of trace fossils – geological records of biological activity – embedded in lavas beneath the ocean floor. Filamentous ...
(Phys.org)—Accurately determining the relative percentages of the elements comprising the Earth's core and mantle which formed early – that is, within 30 Ma (megaannum, or million years) after the solar system itself ...
(Phys.org) -- What’s in a name? Quite a bit in climate science, where the term teleconnection refers not to digital communications, but rather to a recurring and persistent large-scale pattern of pressure and circulation ...
(PhysOrg.com) -- At the end of the Cretaceous period some 65 million years ago, an asteroid slammed into Mexico’s Yucatan Peninsula, causing severe but selective extinction. While that is widely accepted, it has remained ...
(PhysOrg.com) -- While geological evidence points to the presence of liquid water on Mars during the Noachian epoch (the period from 4.5 to 3.5 billion years ago), determining the temperature of that water – a factor ...
(PhysOrg.com) -- Most people who buy bottled water have access to clean drinking water virtually for free (in the US, tap water costs less than a penny per gallon, on average). Nevertheless, the consumption of bottled water ...
