Archivi
free counters
Cornucopia 3D
Avvertenze
Questo blog non rappresenta una testata giornalistica in quanto viene aggiornato senza alcuna periodicità. Non può pertanto considerarsi un prodotto editoriale ai sensi della legge n. 62 del 7/03/2001. Le foto presenti sul blog sono dei rispettivi autori, nel caso violino i diritti d'autore saranno rimosse in seguito a pronta comunicazione.
Revolever Map

Archive del 11 febbraio 2010

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.

UntitledSi 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.

Leggi il resto di questo articolo »

Universo Segreto
Universo Segreto
febbraio: 2010
L M M G V S D
« gen   mar »
1234567
891011121314
15161718192021
22232425262728
Babel Fish
La scuola che funziona
Imagozoon
MGMA: dovanojamas gyvūnas#animals #animal #pet #TagsForLikes #dog #cat #dogs #cats #photooftheday #cute #pets #instagood #animales #cute #love #nature #animallovers #pets_of_instagram #petstagram #petsagramTake Off Lesser Black-backed Gull, Helgoland - ck1berlinMGMA: dovanojamas gyvūnas
StatPress
Visits today: 12
FireStats
  • Pagine mostrate: 766360
  • Visitatori unici: 292014
  • Pagine visitate nelle ultime 24 ore: 701
  • Visitatori unici nelle ultime 24 ore: 233
FireStats icon Powered by FireStats
BlogItalia.it - La directory italiana dei blog
http://www.wikio.it
  • Bacteria manipulate salt to build shelters to hibernate
    For the first time, researchers have detected an unknown interaction between microorganisms and salt. When Escherichia coli cells are introduced into a droplet of salt water that is left to dry, bacteria manipulate the sodium chloride crystallization to create biomineralogical biosaline 3-D morphologically complex formations, where they hibernate. Afterwards […]
  • GSAD and Plant rDNA database: two open platforms with plant cytogenetic information
    Having cytogenetic information about plants is basic to classify species and promote new studies on agriculture and crop improvement. This is the main objective of two online platforms that collect chromosome information and provide it to the scientific community.
  • 'Light pollution' may affect love lives of birds in the Viennese Forests
    Artificial light in cities exerts negative effects on humans, animals, and their environment. In an ongoing research project, behavioral biologists are investigating how blue tits in the Viennese Forests react to "light pollution." The study might help to understand effects of “light-at-night” on reproductive behavior of birds. In consequence, it c […]
  • New hope for powdery mildew resistant barley
    New research has opened the way for the development of new lines of barley with resistance to powdery mildew. "Powdery mildew is a significant problem wherever barley is grown around the world," says the lead researcher. "Growers with infected crops can expect up to 25% reductions in yield and the barley may also be downgraded from high qualit […]
  • Parched West is using up underground water: Study points to grave implications for Western U.S. water supply
    A new study finds more than 75 percent of the water loss in the drought-stricken Colorado River Basin since late 2004 came from underground resources. The extent of groundwater loss may pose a greater threat to the water supply of the western United States than previously thought.
FireStats icon Powered by FireStats