Quantcast

Latest Henry Crater Stories

133515511a69db0a05e751fbba9628a01
2008-12-04 17:50:00

Climate cycles persisting for millions of years on ancient Mars left a record of rhythmic patterns in thick stacks of sedimentary rock layers, revealed in three-dimensional detail by a telescopic camera on NASA's Mars Reconnaissance Orbiter.


Word of the Day
ecotone
  • A transitional zone between two communities containing the characteristic species of each.
The word 'ecotone' comes 'eco-' plus a Greek root meaning 'tension'.