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SpaceX Aims for Starship Launch on Friday. Here’s What to Know.

KENNETH CHANG

The audacious maneuver planned for Friday is a key step toward the company’s goal of making rockets fully reusable.

Timing of Climate Science Reports Ignites a Hot Fight at U.N. Talks

CHICO HARLAN AND LISA FRIEDMAN

Several countries that rely heavily on fossil fuels want to delay the next round of scientific assessments that governments use to inform their climate policies.

Can SpaceX catch its Starship?

The 15th spaceflight of SpaceX's giant launch vehicle aims for something unprecedented: snatching both rocket stages from midair after a journey to orbit

The Euclid space telescope captures nearly a billion celestial objects in stunning detail

The enormous trove of galaxies and quasars will help astronomers piece together the most in-depth 3D map of the universe yet made

Malawi Lacks Money to Fund its El Niño Plans

CHICO HARLAN, GOLDEN MATONGA AND JOAO SILVA

The question is being asked across the developing world, where hunger risk is high from the extreme weather El Niño is expected to bring. Malawi has a big plan, but little money.

FAA grounds all U.S. flights days after expanding its AI air traffic system

National ground stops of this kind are exceedingly rare

Democrats Put Targets on Notice as Trump Oversight Takes Shape

EVAN HALPER

Letters sent by two key House committees tell companies and officials not to destroy documents.

Math Puzzle: Slippery slopes

Slide down the slippery slopes of this math puzzle

Why the brain’s ability to picture images may influence decision making

Some people are excellent at visualizing scenes and images in their head, while others can't do it at all

Is there a better way of diagnosing obesity than BMI?

A landmark study proposes a new way to identify people whose excess body fat is affecting their health

We beat screwworm once. Here’s how we’re trying to do it again

Screwworm, which can devastate livestock, was eliminated from the U.S. in 1966. Now they're back and the same old technique won't be enough to get rid of them

See new images from the Euclid space telescope, spanning one billion cosmic objects

The images are part of Euclid's first major data release

Do ice baths help muscles recover after a workout? A new study suggests not

"It isn't clear that ice baths really are the best way to recover post exercise"

Brain Implants Give A.L.S. Patients the Voice to Speak and Sing

CAROLYN Y. JOHNSON

In one demonstration, a former singer sang a musical scale. Afterward she cried tears of joy.

Brain Implants Give A.L.S. Patients the Voice to Speak and Sing

CAROLYN Y. JOHNSON

In one demonstration, a former singer sang a musical scale. Afterward she cried tears of joy.