In the News

Mega-Eruptions Linked to Most Mass Extinctions Over Past 500 Million Years

Mass extinctions litter the history of life on Earth, with about a dozen known in addition to the five largest ones — the last of which, at the end of the Cretaceous Period 66 million years ago, killed off the dinosaurs and 70% of all life on Earth. A new study, led by scientists at Dartmouth College in New Hampshire, concludes that most of these mass extinctions had one thing in common: They occurred after mega-eruptions that spewed volcanic lava and toxic gases for hundreds of thousands of years, and some for as long as a million years.

Students make neutrons dance beneath Berkeley campus

In an underground vault enclosed by six-foot concrete walls and accessed by a rolling, 25-ton concrete-and-steel door, University of California, Berkeley, students are making neutrons dance to a new tune: one better suited to producing isotopes required for geological dating, police forensics, hospital diagnosis and treatment.

Six UC Berkeley faculty elected AAAS fellows

Six scientists are among the 396 newest fellows elected to the American Association for the Advancement of Science (AAAS) for “advancing science applications that are deemed scientifically or socially distinguished.”

Asteroid impact, volcanism were one-two punch for dinosaurs

UC Berkeley geologists have uncovered compelling evidence that an asteroid impact on Earth 66 million years ago accelerated the eruptions of volcanoes in India for hundreds of thousands of years, and that together these planet-wide catastrophes caused the extinction of many land and marine animals, including the dinosaurs.

Did Dinosaur-Killing Asteroid Trigger Largest Lava Flows on Earth?

The asteroid that slammed into the ocean off Mexico 66 million years ago and killed off the dinosaurs probably rang the Earth like a bell, triggering volcanic eruptions around the globe, according to a team of UC Berkeley geophysicists. The impact may have re-ignited the eruptions at the Deccan Traps, initiating the largest lava flows on Earth.

Earth’s magnetic field could flip within a human lifetime

UC Berkeley geophysicist Paul Renne, grad student Courtney Sprain and their Italian and French colleagues found that Earth’s last magnetic reversal took place 786,000 years ago and happened very quickly, in less than 100 years – roughly a human lifetime. The rapid flip is much faster than the thousands of years most geologists thought.

New evidence comet or asteroid impact was last straw for dinosaurs

In an attempt to resolve the issue, scientists at the Berkeley Geochronology Center (BGC), the University of California, Berkeley, and universities in the Netherlands and the United Kingdom have now determined the most precise dates yet for the dinosaur extinction 66 million years ago and for the well-known impact that occurred around the same time.

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