Stories by Alexander Cohen

Alexander Cohen is a research scientist in the Department of Physics at UC Santa Barbara. Having graduated with a B.S. in physics in 2019, Cohen now researches applications of directed energy, primarily for spacecraft propulsion and planetary defense from asteroids.

A large asteroid entering the Earth's atmosphere.

OpinionOctober 13, 2021

Planetary Defense Is Good—but Is Planetary Offense Better?

A new approach could mitigate the most damaging effects of an imminent asteroid or comet strike—or ensure many threatening objects never get close to striking Earth in the first place

Philip Lubin, Alexander Cohen