Dark energy is still one of the greatest cosmic mysteries. For all the time, money and telescopes that humanity has used to uncover its nature, scientists are still asking a fundamental question: What ...

Some 13.8 billion years ago, the universe began with a rapid expansion we call the Big Bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe ...

Last December physicists working on fusion claimed a breakthrough. A team at the National Ignition Facility (NIF) in California announced it had extracted more energy from a controlled nuclear fusion ...

“Dark energy” is a term scientists use to refer to whatever is causing the universe to expand faster over time. We don’t know exactly what dark energy is—no one has ever directly seen or measured ...

The world is in the midst of a shift away from fossil fuels and towards carbon-neutral energy sources, a change expected to be as momentous as the coal that enabled the Industrial Revolution in the ...

It's not just about ending the era of fossil fuels, it's about doing so in a fair way. The effects of the climate crisis have worsened over the past few decades. As hurricanes become stronger, ...