Reporting in the Astrophysical Journal, scientists write of a massive collision between two galaxy clusters. By studying the cosmic remnants of that smashup, they say leftover dark matter isn’t behaving as current theory predicts. Astrophysicist Andisheh Mahdavi discusses this dark matter mystery.
Astrophysicist Neil deGrasse Tyson says space exploration is a key to transforming our economy and will play a crucial role in American success in the years to come. It “transforms the culture into one that values science and technology, and that’s the culture that innovates,” he says.