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- Frogs, salamanders and climate change 18 maggio 2013
- Attacking MRSA with metals from antibacterial clays 18 maggio 2013
- Now we know why old scizophrenia medicine works on antibiotics-resistant bacteria 18 maggio 2013
- Invasive species: 'away-field advantage' weaker than ecologists thought 17 maggio 2013
- Genome sequence of Tibetan antelope sheds new light on high-altitude adaptation 17 maggio 2013
- New era of fisheries policy needed to secure nutrition for millions 17 maggio 2013
- Climate change may have little impact on tropical lizards: Study contradicts predictions of widespread extinction 17 maggio 2013
- Agriculture in China predates domesticated rice: Discovery of ancient diet shatters conventional ideas of how agriculture emerged 17 maggio 2013
- Physicist's tool has potential for brain mapping 16 maggio 2013
- Asian lady beetles use biological weapons against their European relatives 16 maggio 2013
Archive del 11 febbraio 2010
11 febbraio 2010 | 
Autore: La macrauchenia è un mammifero estinto ‘ultimo rappresentante dell’ordine dei litopterni, un gruppo di ungulati vissuti in Sudamerica per tutto il Cenozoico (65milioni di anni fa). Si ritiene che la macrauchenia vagava in branchi nelle sterminate pianure della pampa argentina, brucando le cime degli alberi con l’aiuto della corta proboscide.
Si estinse al termine del Pleistocene (periodo compreso tra i 2,58 milioni di anni 11.700 anni). L’estinzione non dipese dalle glaciazioni (che non interessarono il Sudamerica) ma da una serie di altri fattori tra i quali l’azione di predatori evoluti provenienti dal nord (come gli Smilodon) e, forse, la caccia dei primi uomini.
Pubblicato in Animalia | 
Tag: animali, animali estinti, animali preistorici, Biologia, Zoologia | 
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- Frogs, salamanders and climate changeIncreasingly erratic rainfall patterns can lead to declines in southeastern frog and salamander populations, but protecting ponds can improve their plight. […]
- Attacking MRSA with metals from antibacterial claysMedical researchers have come up with a new approach for developing effective, topical antibacterial agents -- one that draws on a naturally occurring substance recognized since antiquity for its medicinal properties: clay. […]
- Now we know why old scizophrenia medicine works on antibiotics-resistant bacteriaAn old medicine for schizophrenia is effective at treating something completely different than it was designed for: antibiotic-resistant bacteria. So far it has been a mystery how this old schizophrenia medicine works, but now researchers have figured it out. This can lead to a new medicine against the increasingly threatening antibiotic-resistant bacteria. […]
- Invasive species: 'away-field advantage' weaker than ecologists thoughtFor decades, ecologists have assumed the worst invasive species—such as brown tree snakes and kudzu—have an “away-field advantage.” They succeed because they do better in their new territories than they do at home. A new study reveals that this fundamental assumption is not nearly as common as people might think. […]
- Genome sequence of Tibetan antelope sheds new light on high-altitude adaptationHow can the Tibetan antelope live at elevations of 4,000-5,000m on the Qinghai-Tibetan Plateau? Investigators now provide evidence of genetic factors that may be associated with the species' adaption to harsh highland environments. […]