[op-ed snap] How things work

Mains Paper 3 : Awareness In The Fields Of It, Space, Computers, Robotics, Nano-Technology, Bio-Technology |

Note4Students

From UPSC perspective, the following things are important :

Prelims level : Nobel Prize winners and discoveries

Mains level : Frontiers of science


Context

The first Nobel prizes of this year are announced.

The prize

  • The prize honors fundamental discoveries of the processes which run the universe and living things in it. 
  • The prizes also look ahead to a better and more interesting future

Physiology

  • William G Kaelin Jr, Sir Peter J Ratcliffe, and Gregg L Semenza have won the prize for physiology or medicine for discovering the pathways by which cells adapt to oxygen availability.
  • It is of considerable medical use towards understanding cellular respiration.
  • It is the most significant step since 1937 when Hans Adolf Krebs and William Arthur Johnson discovered the cycle mediated by ATP, which powers life.

Physics

  • Half of the prize in physics went to James Peebles, whose theoretical framework describing the universe from the Big Bang to the present underpins all of physical cosmology. 
  • He concluded that we can sense only 5% of the universe. The rest is dark matter and dark energy, whose presence can only be inferred by their influence on phenomena. 
  • The other half of the physics Nobel prize is shared by Michel Mayor and Didier Queloz, for the discovery in 1995 of the first exoplanet, orbiting the star 51 Pegasi
  • Their technique, using Doppler spectroscopy, supplemented the traditional transit method and has led to the discovery of 4,000 planets circling distant suns.

Conclusion

Is there life on exoplanets? Peebles appears to be convinced that even if there is, we may not recognise it, because it may not use Hans Krebs’ cycle at all.

Nobel and other Prizes
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