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Why Einstein's theories of relativity make time travel possible

Physicists, mathematicians and philosophers have been exploring the possibility of going forward to the future or back to the past

‘OnlyMarms’: Marmots Are on OnlyFans to Raise Money for Research

EMMETT LINDNER

A team of scientists uploaded videos of the squirrel-like rodents in the wild on the adult-content site OnlyFans to raise money amid government budget cuts.

Gunther von Hagens, Creator of Polarizing ‘Body Worlds’ Exhibits, Dies at 81

CLAY RISEN

A German scientist, he developed a process for turning corpses into posable figures. His shows drew millions of visitors, and many detractors.

Math’s acclaimed ‘einstein tile’ finds a new home among physicists

Discovered by an amateur mathematician in 2022, this strange construct can tile an infinite surface without repeating. But can it be useful in the real world?

Neuroscientists pinpoint how smells bring back childhood memories

Smell can bring back vivid childhood memories—the so-called "Proust's madeleine" phenomenon—and neuroscientists now think they know why

Avocado flowers switch sex daily—now we know why

New work explains how avocado trees coordinate a complex reproductive strategy, switching every day between male and female

The ultimate science summer reading list

SciAm books editor Bri Kane shares her favorite science books for every summer mood

Fauci Invokes the Fifth Amendment, Refusing to Answer Senate Committee Questions

SHERYL GAY STOLBERG

The panel’s chairman, Rand Paul, has long accused Dr. Fauci of funding research that triggered the Covid pandemic and lying about it to Congress — charges Dr. Fauci denies.

A unique cellular trick may explain octopus intelligence

A newly discovered change in ribosomal RNA makes protein production more precise, potentially safeguarding these cephalopods' complex nervous systems

Hundreds of ancient, never-before-seen ‘earthworks’ discovered in the Amazon

Many of these structures date to around C.E. 100–300, during the time of the Aquiry civilization, and may have been used for ceremonial purposes

Rescue mission to save NASA’s Swift space telescope is imperiled in orbit

A private spacecraft launched to boost the decaying orbit of NASA's Swift Observatory is now suffering from potentially mission-ending malfunctions

Astronomers spot best-yet example of a wandering supermassive black hole

Giant black holes adrift in deep space are normally invisible—unless they're dining on stars

Should We Make Daylight Saving Time Permanent?

LYNNE PEEPLES

More light at the day’s end comes at a price: much later winter sunrises across much of the U.S. Scientists have documented consequences for public health and the economy.

Trump Administration Is Repurposing Federal Land for A.I. Data Centers

BRAD PLUMER

In the latest example, the Energy Department will convert a shuttered Cold War-era uranium enrichment facility into a data center campus and gas plants.

Bizarre new material discovered in Hiroshima bombing debris

he extreme conditions of atomic bomb explosions create "uncontrolled microexperiments" that, in Hiroshima, forged a never-before-seen metallic alloy