How many people are in outer space right now

Algae blooms, peeling paint, and a host of fixes from hydrogen peroxide to nanobubblers have made it hard to diagnose what’s wrong with the Reflecting Pool—let alone how to clean up the mess.

The commercial was submitted by the Freedom of the Press Foundation to run during Donald Trump’s UFC event. It criticized the $111 billion merger as a threat to the First Amendment.

Previous landmark scientific discoveries like the Higgs boson provide a better template for what it will take to confirm whether aliens have made contact with Earth.

A study based on 47 million galaxies found that the cosmic web retains patterns on enormous scales, which could force a reevaluation of a pillar of cosmology.

The Yahoo Boys author Carlos Barragán will join Kate Knibbs to answer your questions about Nigeria's romance scammers.

Researchers say the discovery could be a “Rosetta stone” for cosmic signals.

Extreme heat coupled with humidity will make it feel like 109 degrees Fahrenheit as the holiday weekend approaches.

Explore decades of incredible images and videos of stars, planets, moons, and galaxies—most of which are free to use and share.

The incident could disrupt a key part of the defense company’s rocket motor business, which designs and tests prototype motors for military customers.

Planning a Fourth of July getaway? Use less gas—and cut your emissions—by easing up on the pedal.

Nimble’s thoughtfully designed SharePower is a modular power bank you can share with a friend.

The lab will beam back data to train AI models to predict how proteins behind age-related diseases like Alzheimer’s and certain cancers behave.