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Greg Laden's Blog

Evolution, Life Sciences, Science Education, Human Evolution, and Stuff

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Extinction:

Arabian Dinosaur Trackway Discovered

Dinosaur tracks are reported for the first time on the Arabian Peninsula. These new tracks are located in Yemen. This find is interesting and important for several reasons....

New in Paperback Book on Permian Mass Extinction

When Life Nearly Died: The Greatest Mass Extinction of All Time is a book by Michael Benton on the Permian Extinction now out in paperback. From the press release: Today it is common knowledge that the dinosaurs were wiped out by a meteorite impact sixty-five...

Did sexist white males cause the extinction of the woolly mammoth, or was it climate change?

Ever since 3,599 years ago humans have been asking the question "Why did our furry elephant go extinct?" What caused the woolly mammoth's (not to be confused with the also-woolly mastodon) extinction? Climate warming in the Holocene might have driven the extinction of this cold-adapted...

Mammals and the KT Event

A very important and truly wonderful paper in Nature described a tour-de-force analysis of the Mammalian Evolutionary Record, and draws the following two important conclusions: The diversification of the major groups of mammals occurred millions of years prior to the KT boundary event; and The...

Darwin and the Voyage: 11 ~ Elephants and Horses

In 1833, Darwin spent a fair amount of time on the East Coast of South America, including in the Pampas, where he had access to abundant fossil material. Here I'd like to examine his writings about some of the megafauna, including Toxodon, Mastodon, and horses,...

Are We In The Anthropocene? No.

Proposals to give the latter part of the present geological period (the Holocene) a new name ... the Anthropocene ... are misguided, scientifically invalid, and obnoxious. However, there is a use for a term that is closely related to "Anthropocene" and I propose that...

Did Humans or Climate Change Cause the Extinctions of Pleistocene Eurasian Megafauna?

 Did humans wipe out the Pleistocene megafauna? This is a question that can be asked separately for each area of the world colonized by Homo sapiens. It is also a question that engenders sometimes heated debate. A new paper coming out in the Journal...

After the End Permian Mass Extinction

The end-Permian mass extinction event was the big daddy of all the known mass extinction events. Life on the planet Earth was almost entirely wiped out. A new paper explores the post-extinction recovery of ecological systems....

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