Search
Search results
Displaying 1 - 2
glacial periods
(Encyclopedia) glacial periods, times during which large portions of the earth's surface were covered with thick glacial ice sheets. In the Pleistocene epoch, in the Carboniferous and Permian periods…sunspots
(Encyclopedia) sunspots, dark, usually irregularly shaped spots on the sun's surface that are actually solar magnetic storms. The spots are darker because the temperature of the spots is lower than…Trending
Here are the facts and trivia that people are buzzing about.
