Using nighttime air chemistry to track ozone impact

Using nighttime air chemistry to track ozone impact

St. Louis’ hazy summers can sometimes be too hot to handle for people with respiratory issues; increased ozone levels can make the air tough to breathe. A team of engineers at Washington University collaborated on a study of St. Louis’ late-summer air quality. They found that naturally occurring compounds processed in the night sky can have a big impact on ozone levels the next day.
Cause and effect, or effect and cause?

Cause and effect, or effect and cause?

A lab at Washington University in St. Louis is one of the first in the world to look at spontaneous emission with an instrument sensitive to the wave rather than the particle nature of light. Because the light is entangled with the atom that emitted it, this kind of detection may provide a way to control the quantum state of the atom.
Multicultural geology

Multicultural geology

This spring, theory-heavy Washington University in St. Louis geology students went on a field trip to southeastern Spain with field-trained students from Trinity College, Dublin. What they learned from each other transcended earth — and time.
Why is radioactive iron raining down on us?

Why is radioactive iron raining down on us?

Most of the galactic cosmic rays reaching Earth come from nearby clusters of massive stars, according to new observations from NASA’s ACE spacecraft. The distance between the cosmic rays’ point of origin and Earth is limited by the survival of a radioactive isotope of iron, Fe-60, which has a half life of 2.6 million years. These tiny clocks indicate there was a source within spitting distance of Earth within the past few million years.
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