For decades, scientists have struggled to achieve the necessary precision for the ampere. But a device called the skipper CCD could spark an advance in measurement science.
From Oct. 26-31, a series of Dark Matter Day events will highlight the global search for dark matter, which, together with dark energy, makes up about 95% of the mass and energy in our universe.
In theory, the particles could reveal whether a reactor is building up plutonium for weapons. US energy experts are starting to take the idea seriously.
How is it possible to look at the earliest moments of the universe? Physicists have their ways—and what they find out will tell us a lot about how the universe works today and how it will unfold in the future.