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Campus raises concerns for wildfire season, COVID-19
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David Wake, a widely-loved and respected UC Berkeley professor emeritus of integrative biology and the world’s leading salamander expert, died April 29 at the age of 84.
After getting his doctorate at the University of Southern California, David Wake was an assistant professor at the University of Chicago until 1969, when he was hired at UC Berkeley. According to his wife, Marvalee Wake, who is also a graduate professor in integrative biology, the two viewed their science as “complementary.”
“Hundreds of messages (are) coming in worldwide that pretty much say the same thing, talking about his high level of integrity, his ethical nature, his warmth and friendliness, his intellectual curiosity and intellectual scope,” Marvalee Wake said.
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2.5 Billion Tyrannosaurus Rexes Roamed North America over a Period of 2.5 Million Years Over approximately 2.5 million years, North America likely hosted 2.5 billion Tyrannosaurus rexes, a minuscule proportion of which have been dug up and studied by paleontologists, according to a UC Berkeley study.
Image by Julius Csotonyi, courtesy of Science magazine
How many Tyrannosaurus rexes roamed North America during the Cretaceous period?
That’s a question Charles Marshall pestered his paleontologist colleagues with for years until he finally teamed up with his students to find an answer.
What the team found, to be published this week in the journal Science, is that about 20,000 adult T. rexes probably lived at any one time, give or take a factor of 10, which is in the ballpark of what most of his colleagues guessed.
How many T rexes were there? Billions - ScienceBlog com
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