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Astro Biology

Know When Milky Way Collision Occur - 0 views

www.astrobio.net/...ollision-100-million-years-ago

milky way satellite galaxy news from nasa solar system planet

shared by Astro Biology on 20 Nov 14 - No Cached
  • Astro Biology on 20 Nov 14
     
    NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?
  • Astro Biology on 20 Nov 14
     
    NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?
Rima Touya

Alfred Wegener - Wikipedia, the free encyclopedia - 8 views

en.wikipedia.org/...Alfred_Wegener

Alfred Wegener

shared by Rima Touya on 05 Sep 11 - No Cached
  • Alfred Wegener first thought of this idea by noticing that the different large landmasses of the Earth almost fit together like a jigsaw.
  • The Continental shelf of the Americas fit closely to Africa and Europe, and Antarctica, Australia, India and Madagascar fit next to the tip of Southern Africa.
  • He analyzed either side of the Atlantic Ocean for rock type, geological structures and fossils. He noticed that there was a significant similarity between matching sides of the continents, especially in fossil plants.
  • ...7 more annotations...
  • From 1912, Wegener publicly advocated the theory of "continental drift", arguing that all the continents were once joined together in a single landmass and have drifted apart.
  • In his work, Wegener presented a large amount of very strong
  • In 1943 George Gaylord Simpson wrote a vehement attack on the theory
  • evidence in support of continental drift, but the mechanism remained elusive. While his ideas attracted a few early supporters such as Alexander Du Toit from South Africa and Arthur Holmes in England, the hypothesis was generally met with skepticism from largely conservative scientists, who were resistant to any change in the status quo.
  • but G.G.Simpson's influence was so powerful that even in countries previously sympathetic towards continental drift, like Australia
  • Wegener's hypothesis fell out of favour.
    • Annabelle Cheng
      Annabelle Cheng on 05 Sep 11
       
      Diagram to show evidence
  • Annabelle Cheng on 05 Sep 11
     
    How Alfred W. first came up with this theory...
pbranston

A Science Odyssey: You Try It: Plate Tectonics - 11 views

www.pbs.org/...tectonics

Plate tectonics earth structure

shared by pbranston on 04 Sep 13 - No Cached
  • Simon Scoones on 04 Sep 13
     
    Useful pages on Wegener and the people that helped to prove his theory of Continental Drift.
  • Aayush Kogar on 04 Sep 13
     
    I agree. I recommend this website as a quick and easy read, learn something new and catch up on the things we have been doing in class.
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