Gamma rays from a dwarf galaxy solve an astronomical puzzle

(Image credit: NASA’s Goddard Space Flight Center) This article was originally published at The Conversation. (opens in new tab) The contributed the article to’s Expert Voices: Op-Ed & Insights. A glowing blob known as “the cocoon,” which appears to be inside one of the enormous gamma-ray emanations from the center of our galaxy dubbed … Read more

DNA profiling solves Australian rabbit plague puzzle

The colonization route of the European rabbit from Iberian Peninsula to Australia and New Zealand. Credit: Joel Alves Rabbits were first introduced to mainland Australia when five domestic animals were brought to Sydney on the First Fleet in 1788. At least 90 subsequent importations would be made before 1859 but none of these populations became … Read more

Physicists confront the neutron lifetime puzzle

From left, ORNL’s Matthew Frost and Leah Broussard used a neutron scattering instrument at the Spallation Neutron Source to search for a dark matter twin to the neutron. Credit: Genevieve Martin/ORNL, US Dept. of Energy To solve a long-standing puzzle about how long a neutron can “live” outside an atomic nucleus, physicists entertained a wild … Read more