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How Did Christa Pike Survive Two Lethal Injections of Pentobarbital?

BENJAMIN MUELLER

A catheter carrying the drug may not have delivered the doses to Ms. Pike’s bloodstream, experts said. The drug itself may have been degraded.

States Sue Over Trump’s Repeal of Climate Rules for Power Plants

BRAD PLUMER

The mostly Democratic-led states say that the E.P.A. acted unlawfully when it erased Biden-era limits on carbon dioxide from coal- and gas-fired plants.

Google’s Project Suncatcher AI data center test has officially launched to space onboard SpaceX rocket

Project Suncatcher is aimed at testing Google's AI chips in the harsh environment of space

The MacArthur ‘Genius’ Studying Sea Ice Secrets

CLAIRE BROWN

A climate scientist was one of 20 recipients of a “no-strings-attached” $800,000 stipend.

Anthropic’s Quest for Humanlike A.I.

ELIZABETH DIAS, CADE METZ, CHRISTINA SHAMAN, CHRIS WHITWORTH, STEPHANIE SWART, WHITNEY SHEFTE AND MARK OLTMANNS

Elizabeth Dias, our national religion correspondent, and Cade Metz, one of our technology reporters, discuss Anthropic’s approach for instilling morality into Claude — which has involved consultations with religious leaders, including ones at the Vatican — and why it’s raising questions.

How to see rainbows on exoplanets

A future NASA telescope could spot atmospheric phenomena on planets orbiting other stars

Mathematicians Name 50 of the Highest-Stakes Problems in Math

Mathematicians have a new bucket list of open questions to chase

How to start foraging for edible plants, according to Black Forager

How foraging can change the way we think about food and nature

See How El Niño Is Washing Ashore in California

RAYMOND ZHONG

An enormous pulse of wave energy will soon reach Southern California and continue north, raising sea levels by half a foot and increasing threats from swells and tides.

Can bioengineered bacteria help terraform Mars?

The nonprofit start-up Pioneer Labs claims to have made the first-ever "microbe for Mars." Other experts aren't so sure

This weird particle may have come from a black hole exploding in another dimension

An unexplained high-energy neutrino detected three years ago could be linked to a primordial black hole, perhaps one more even unusual than previously thought

Scientists Untangle the Biology of an ‘Undruggable’ Cancer Gene

CAROLYN Y. JOHNSON

Found in 70 percent of cancers, the gene is seen as a grand orchestrator but has been surprisingly difficult to stop.

Could a giant iceberg really break off Greenland? Scientists check Tom Cruise’s new movie Digger

In the movie, a giant iceberg from Greenland floats into the sea, imperiling millions—but is that even possible?

2026 has been a record hot year for the U.S.—it can only get worse

So far this year has been ridiculously hot. If it stays that way, 2026 could set a sobering new record

F.D.A. Found Cyclospora During Taylor Farms Inspection in Mexico

CHRISTINA JEWETT, ALICE CALLAHAN AND CAROLINE HOPKINS LEGASPI

The discovery adds strong evidence that the outbreak that sickened thousands over the summer originated in the company’s fields or processing facility in northeastern Mexico.