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This Day in History
Jimmy Hoffa disappears, 1975
On July 31, 1975, James Riddle Hoffa, one of the most influential American labor leaders of the 20th century, disappears in Detroit, Michigan, never to be heard…
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A new study suggests that the dramatic upheaval caused by European colonization of the Americas may have marked the beginning of a new period of geologic time.
During the last ice age, they drifted thousands of miles south from Canada, researchers find.
Researchers have confirmed that a tiny gem found in western Australia is the oldest known piece of Earth, dating back some 4.4 billion years.
Some 252 million years ago, the planet’s largest mass extinction took place in only around 60,000 years — almost instantaneously, relative to geologic time.
New research published this weekend provides the latest fodder for a long-standing debate over when the majestic Grand Canyon was actually formed.
A team of researchers has discovered more information about what causes “supervolcanoes” to erupt, and their findings are unsettling.
A new study finds that so-called “ghost glaciers” – layers of non-erosive glacial ice – have protected Greenland’s ancient landscapes for more than 800,000 years.