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Recalling when the Mars Exploration Rover 'Spirit' started its 6-year journey
The Weather Network via Yahoo News· 1 year agoThe Spirit's primary job was to investigate Mars for 90 sol days (sol days are 39.7 minutes longer...
Mathematicians make rare breakthrough on notoriously tricky 'Ramsey number' problem
Live Science via Yahoo News· 1 year agoA visual representation of Ramsey theorem for five nodes on a graph. Here, no triangle has edges...