Quantcast

Latest Dennis Kucik Stories

6bbabee444487d210eee603c6aff75b01
2011-04-07 14:40:00

Astronauts anticipate more trips to the moon and manned missions to Mars, but exposure to cosmic radiation outside the Earth’s magnetic field could be detrimental to their arteries.


Word of the Day
pawl
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.
Related