The company's suborbital vehicle launched on a secret government mission and ended up somewhere unexpected.

X-59 flew at Mach 1.4 in preparation for debuting its quiet thump to the public.

Caltech says its Deep Synoptic Array will be larger and 100-times faster than any radio telescope ever constructed.

The Hubble tension—a disagreement over the universe's expansion rate—has led to fears of a cosmology crisis, but is it actually that serious?