Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

Researchers mapped Earth’s ionosphere, part of the upper atmosphere, using signal data from 40 million phones – a method that ...

Those signals travel rapidly and unobstructed through space until they hit the ionosphere ... roughly 100,000 locations ...

If another gravity theory is correct, "then the broader implications are enormous," astrophysicist Stacy McGaugh told ...