Tracking Down the "Missing" Carbon From the Martian Atmosphere

Caltech and JPL researchers identify a process involving UV light from the sun that helps explain how a moderately dense martian atmosphere 3.8 billion years ago could have evolved into the current thin one without invoking a missing carbon reservoir.

Schools Help Researchers Understand Quakes

A new collaboration between seismologists at Caltech and local public schools helps Los Angeles prepare for the "big one."

Elachi to Retire as JPL Director

Charles Elachi has announced his intention to retire as director of the Jet Propulsion Laboratory on June 30, 2016 and move to campus as professor emeritus. A national search is underway to identify his successor.

Probing the Mysteries of Europa, Jupiter's Cracked and Crinkled Moon

Using data from the W. M. Keck Observatory's OSIRIS spectrometer and maps from NASA's Galileo probe, researchers have mapped what may be salt deposits from the ocean below the ice onto the Jovian moon's surface.

Cassini Begins Its Final Act: A Conversation with Charles Elachi

In September, the NASA/JPL Cassini mission began the last two years of the Solstice Mission. We recently spoke with JPL director Charles Elachi to gain his unique perspective on Cassini's achievements—and what will come next.

Taking Dinosaur Temperatures with Eggshells

A team of Caltech researchers has measured the body temperatures of a wide range of dinosaurs, providing insight into how the animals may have regulated their internal heat.

Wet Paleoclimate of Mars Revealed by Ancient Lakes at Gale Crater

New evidence indicates that Gale Crater on Mars was filled with water-borne sediment, and excavated, in a shorter time than previously thought, leaving the base of Mount Sharp behind.

Alumnus Arthur McDonald Wins 2015 Nobel Prize in Physics

Arthur B. McDonald (PhD '70), director of the Sudbury Neutrino Observatory (SNO) in Ontario, Canada, and Takaaki Kajita, at the University of Tokyo, Kashiwa, Japan, have shared the 2015 Nobel Prize in Physics for the discovery that neutrinos can change their identities as they travel through space.

Summer Interns Return with a World of Experiences

Caltech undergraduate students returned to campus this week, many after spending the summer working at companies in biotechnology, technology, and finance, among other fields. These students have had the opportunity to learn firsthand about the career opportunities and paths that may be available to them after graduation.

New Courses for the 2015–16 School Year

The start of the 2015–2016 school year brings not only new freshmen and faculty, but also new courses.

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