Before it shut down, a telescope in Chile captured the universe's baby photos, just 380,000 years after the Big Bang. These ...

Dark energy is the placeholder name scientists have given to the unknown force causing the universe to expand faster and ...

Dark energy makes up roughly 70 percent of the universe, yet we know nothing about it. Around 25 percent of the universe is ...

But some recent cosmic clues have been chipping away at the leading theory for this phenomenon ... This story begins -- like everything else -- at the Big Bang around 13.8 billion years ago ...