Here’s how the Pfizer/BioNTech, Moderna, and other coronavirus vaccines work, their potential side effects, who’s first in line to receive them, and why we need to address racial and social equities.

The CDC advises people to avoid travel for the 2020 holidays due to COVID-19 surges.

President Trump said that he recovered from COVID-19 in part thanks to an antibody cocktail. What is an antibody cocktail and how does it work?

Election officials have braced for an unprecedented wave of mail-in ballots. What safeguards are in place to track individual ballots as they travel to voters and back to the election office?

As global temperatures rise, scientists are exploring solutions from planting trees to sucking carbon out of the air to geoengineering. But would they work? And what are the risks of engineering Earth's climate?

Scientists propose putting reflective aerosols into the stratosphere to reflect the sun's rays. But will this have unintended consequences?

This visualization uses Washington D.C.'s National Mall to show the scale of human coal consumption—and how much CO2 it adds to our atmosphere.

Using laser technology aboard the International Space Station, Lola Fatoyinbo can get a 3D measure of forest carbon—making it the first near-global dataset.

Scientists found bits of rock and dust flying off the asteroid Bennu. Is the OSIRIS-REx spacecraft in danger?

NASA's OSIRIS-REx spacecraft successfully touched and collected a sample from the surface of asteroid Bennu—without a human at the controls.