A Danish/Swedish/French research team has shown that 2.1 billion years ago, the oxygen content on Earth was probably same as it was during he so-called Cambrian explosion, 500 million years ago.
New Light on Human Evolution Shed By Unique Skull
Nearly half a dozen species of our early human ancestor may have been all Homo erectus, suggests a new skull, found in Dmanisi.
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The team consists of professor Donald Canfield and postdoc Emma Hammarlund from the Nordic Center for Earth Evolution (NordCEE) at University of Southern Denmark, colleagues from the National Museum in Sweden and colleagues from the following French institutions: Universite de Poitiers, the Centre National de la Recherche Scientifique, Institut Francais de la Recherche pour l' Exploitation de la Mer, Centre de Brest and the Universite de Rennes in France.
Hammarlund said that they examined rocks that are 2.15 billion - 2.08 billion years old that showed them that there was oxygen in deep water and thus also in the atmosphere at that time.
An Evolutionary Perspective Provides Better Understanding of the HIV Epidemic
Scientists can use ever more powerful evolutionary biology tools to pinpoint the transmission and death rates for epidemics such as HIV, with the abundance of sequencing data.
Scientists can use ever more powerful evolutionary biology tools to pinpoint the transmission and death rates for epidemics such as HIV, with the abundance of sequencing data.
It shows that the content of atmospheric oxygen has taken several ups and downs. 250 - 300 million years ago oxygen content rose to up to 25 percent, and this led to the development of some enormous insects. But everything was not all good: The high oxygen content simply increased the chance for trees to ignite, so it was also a period of many wildfires. This has been revealed by layers of ash from that time.
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E-cigarette Revolution Gets a Revolution
E-cigarettes, the supposedly harmless alternative to tar-depositing tobacco loaded cigarettes, is now seducing thousands in Europe and America
E-cigarettes, the supposedly harmless alternative to tar-depositing tobacco loaded cigarettes, is now seducing thousands in Europe and America
An Injection can Revolutionise Breast Cancer Cure
In Britain, an injection that could revolutionise breast cancer treatment has been granted a licence for use.
In Britain, an injection that could revolutionise breast cancer treatment has been granted a licence for use.
