The authoritative guide to ensuring science and technology make life on Earth better, not worse.


Chelsea D. Willett

Chelsea D. Willett holds a PhD in Earth and Planetary Science from the University of California, Berkeley. Her dissertation focused on the role of radiation damage in apatite crystals in geologic dating methods and data interpretation. She is currently a Postdoctoral Researcher at Lawrence Livermore National Lab, where she applies noble gas mass spectrometry to problems of nuclear nonproliferation and planetary science.


Articles by Chelsea D. Willett

Iskander-M short-range ballistic missile system with two 9M723K5 missiles, at a Russian demonstration of military technology in 2017. The Iskander system is reported to be capable of firing ballistic missiles that can carry a tactical nuclear warhead. Photo by Vitaly Kuzmin

As tensions mount on Ukraine’s borders, it’s time to understand what led to the INF Treaty’s demise

By Aaron J. Berliner, Jake Hecla, Michael Bondin, Austin Mullen, Elena Osorio Camacena, Alex Droster, Dinara Ermakova, Tyler Scott Nagel, Nicole L. Nappi, Katherine J. Oosterbaan, Sarah R. Stevenson, Chelsea D. Willett, Eric F. Matthews, Manseok Lee, Karl van Bibber, Michael Nacht | Nuclear Risk, Nuclear Weapons, Opinion, Voices of Tomorrow