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Thomas H. Clarke, Jr.
Was oxygen present in quantity on Earth a billion years before the current accepted time-frame? Perhaps so

This is the first in a series of posts over the next week that addresses various issues related to the evolution of life on Earth. The purpose is to show the ever-growing body of knowledge, and how that knowledge is changing fundamental assumptions about...

Thomas H. Clarke, Jr.
The environmental impact of quantum dots moves from theory to reality

Prior posts have noted the halting attempts by EPA (using TSCA) and California to address issues related to the potential human health and environmental impacts of nanotechnology. Much of the concern has been theoretical, based on analogies with like...

Thomas H. Clarke, Jr.
Perchlorate found in powdered infant formula

Perchlorate occurs naturally in the environment; it's also made for use in rocket propellant, explosives, fireworks, and road flares. Perchlorate has been found in drinking water in some areas of the country, as well as in food and *** milk. [See...

Thomas H. Clarke, Jr.
Evolutionary theory may help to identify strategies for insect suppression

Malaria kills a million humans a year, and debilitates hundreds of millions more. New drugs have been introduced, such as Artemisia, but already resistance is appearing in some geographical areas. Scientists are also working on a vaccine, but such tools...

Thomas H. Clarke, Jr.
The rush into biofuels may be a major error

Prior posts have noted that EPA is conducting an assessment of biofuels to ascertain if they are truly "renewable", and that the so-called GHG emission benefits of ethanol appear to disappear if the "indirect" land-use effects are...

Thomas H. Clarke, Jr.
Scientists identify for the first time the transfer of functional genes from symbiotic bacteria to host animal

Most aphids host mutualistic bacteria, Buchnera aphidicola, which live inside specialized cells called bacteriocytes. Buchnera are vital to the aphids’ well being since they provide essential amino acids that are scarce in its diet. New research...