Cosmologist Brian Nord joins host Regina G. Barber in a conversation that talks about what dark energy could be and what it implies about the end of our universe.
About 2,200 people took part in hands-on science activities, performances, lectures and exhibits at Sanford Underground Research Facility's Neutrino Day celebration this year.
The largest camera ever built for astrophysics has completed the long journey from SLAC National Accelerator Laboratory in California to the summit of Cerro Pachón in Chile.