His research has developed new laser absorption diagnostics for Stanford and the NASA Ames electric arc shock tube (EAST) and inferred time-histories and reaction rates at the extreme conditions ...

A selection of fossilized micrometeorites recovered from Cretaceous chalk. These particles were initially composed of Fe-Ni metal but during atmospheric entry they oxidized to form Fe-oxide minerals.

With Sunita Williams and Butch Wilmore set to return to Earth after nearly nine months in space, let's look at how the astronauts' return takes place ...