Clouds need two essential ingredients to form, and both must be present simultaneously for the process to begin. There are two ingredients needed for clouds to form: water and nuclei. The first ...

'Even though these short-lived, exotic creatures are not around today, they could have affected cosmic history in ways that could show up in subtle signals today.' When you purchase through links on ...

In the first quintillionth of a second, the universe may have sprouted microscopic black holes with enormous amounts of nuclear charge, MIT physicists propose. The gravitational pull from these tiny, ...