David Catling
September 18, 2024
Explaining dramatic planetwide changes after world’s last ‘Snowball Earth’ event
Some of the most dramatic climatic events in our planet’s history are “Snowball Earth” events that happened hundreds of millions of years ago, when almost the entire planet was encased in ice up to 0.6 miles thick. New research from the University of Washington provides a more complete picture for how the last Snowball Earth event ended, and suggests why it preceded a dramatic expansion of life on Earth, including the emergence of the first animals.
January 22, 2024
Shallow soda lakes show promise as cradles of life on Earth
Field observations from an unusual lake show that in environments known as “soda lakes” phosphate can concentrate at the very high levels needed for the basic molecules of life to emerge. A shallow, salty lake in western Canada gives new support to Charles Darwin’s idea that life could have emerged in a “warm little pond.”
September 19, 2023
Five UW faculty members elected as AGU Fellows, plus more honors
The American Geophysical Union announced Sept. 13 that five University of Washington faculty members have been elected as new fellows, representing the departments of astronomy, Earth and space sciences, oceanography, global health, and environmental and occupational health sciences.
June 9, 2020
Volcanic activity and changes in Earth’s mantle were key to rise of atmospheric oxygen
Evidence from rocks billions of years old suggest that volcanoes played a key role in the rise of oxygen in the atmosphere of the early Earth.
January 24, 2020
Tiny, ancient meteorites suggest early Earth’s atmosphere was rich in carbon dioxide
Tiny meteorites that fell to Earth 2.7 billion years ago suggest that the atmosphere at that time was high in carbon dioxide, which agrees with current understanding of how our planet’s atmospheric gases changed over time.
December 30, 2019
Life could have emerged from lakes with high phosphorus
Life as we know it requires phosphorus, which is scarce. So, how did a lifeless environment on the early Earth supply this key ingredient? A new UW study, published Dec. 30 in the Proceedings of the National Academy of Sciences, finds an answer to this problem in certain types of carbonate-rich lakes.
June 20, 2019
Looking for life: UW researchers, presentations abound at 2019 astrobiology conference in Bellevue
A roundup of UW talents and presentations in AbSciCon2019, the national conference on astrobiology — the search for life in the universe — to be held in Bellevue, June 24-28.
June 19, 2019
Abundance of gases in Enceladus’s ocean are a potential fuel — if life is there to consume it
The subsurface ocean of Saturn’s moon Enceladus probably has higher than previously known concentrations of carbon dioxide and hydrogen and a more Earthlike pH level, possibly providing conditions favorable to life, according to new research from planetary scientists at the UW.
June 25, 2018
UW part of NASA network coordinating search for life on exoplanets
Researchers with the UW-led Virtual Planetary Laboratory are central to a group of papers published by NASA researchers today in the journal Astrobiology outlining the history — and suggesting the future — of the search for life on exoplanets, or those orbiting stars other than the sun.
April 2, 2018
Earth’s stable temperature past suggests other planets could also sustain life
Earth has had moderate temperatures throughout its early history, and neutral seawater acidity. This means other rocky planets could likely also maintain this equilibrium and allow life to evolve.
January 24, 2018
A new ‘atmospheric disequilibrium’ could help detect life on other planets
A University of Washington study has found a simple approach to look for life that might be more promising than just looking for oxygen.
May 22, 2017
Weathering of rocks a poor regulator of global temperatures
Evidence from the age of the dinosaurs to today shows that chemical weathering of rocks is less sensitive to global temperature, and may depend on the steepness of the surface. The results call into question the role of rocks in setting our planet’s temperature over millions of years.
May 9, 2016
Early Earth’s air weighed less than half of today’s atmosphere
The idea that the young Earth had a thicker atmosphere turns out to be wrong. New research from the University of Washington uses bubbles trapped in 2.7 billion-year-old rocks to show that air at that time exerted at most half the pressure of today’s atmosphere. The results, published online May 9 in Nature Geoscience, reverse…
December 18, 2015
Oxygen provided breath of life that allowed animals to evolve
It took 100 million years for oxygen levels in the oceans and atmosphere to increase to the level that allowed the explosion of animal life on Earth about 600 million years ago, according to a study co-authored by two University of Washington scientists and led by the University College London.
December 9, 2013
Astronomers solve temperature mystery of planetary atmospheres
An atmospheric peculiarity the Earth shares with Jupiter, Saturn, Uranus and Neptune is likely common to billions of planets, University of Washington astronomers have found, and knowing that may help in the search for potentially habitable worlds.
