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The Nazca Lines are sprawling geoglyphs that were constructed on Peru's ground and hillsides around 2,000 years ago. But why were they built?

You'll have two chances to see the Hunter's Moon rise dramatically this month. Here's when to get the best views of it.

AI companies know they are being held hostage by each other, and that they need to take action to self-regulate before they suffer major reputational and legal consequences. There is a blueprint on how they can do it.

MS advocate Christina Applegate recently announced that her MS diagnosis was incorrect, based on new test results. Why can the disease be difficult to identify?

A new technology encodes an invisible mark into the structure of AI-generated proteins, but experts said the system's guardrails can still be bypassed.

During an intense drought from 2020 to 2022, the Upper Colorado River Basin lost far more groundwater than the Lower Basin did, despite having much higher natural recharge.

The melting of the poles is increasingly shifting Earth's shape at a faster rate, with the planet becoming more and more round.

Plants can't easily pick up and move when environmental conditions get rough, so they've evolved strategies to weather harsh conditions in place. That could help some plants survive in the face of a warming climate.

The Martian Moons Exploration (MMX) mission, which launched from Japan on Oct. 19, is on its way to Mars. When it arrives, the probe will attempt to land on one of the Red Planet's twin moons and scoop up rocks to bring back to Earth.…

Researchers filmed dwarf reed snakes (Pseudorabdion) from different angles to better understand how the serpents pull off their remarkable rolling behavior.

Although whole numbers and fractions are processed differently in the brain, when you compare their values, a single "mental map" akin to a number line lights up.

Carrion crows made decisions about their visual environments significantly faster than humans and primates tend to, according to a comparison in a new study.

Artemis II Commander Reid Wiseman felt genuine fear when he saw the Orion spacecraft had gone farther from Earth than anticipated

Doctors ran many tests to uncover the cause of a teen girl's auditory and visual hallucinations.

Analysis of tiny zircon crystals buried within the 10-mile-wide Ames crater in northwest Oklahoma suggests that the submerged structure dates back to 370 million years ago, during the Frasnian-Famennian mass extinction event.

An early bird with many dinosaur-like features discovered in China seems to have been a fast-running, land-based carnivore with killer claws.

A brand-by-brand guide to wildlife cameras, chosen for their autofocus capabilities, burst speed and animal tracking in real conditions, curated by our experts.

Archaeologists excavating a medieval African kingdom have discovered pottery from eastern China, revealing connections across continents.

In this excerpt from "Every Last Fish," author Rose George examines the deep-rooted problems of the regulations surrounding fish meal — a product that's supposed to come from the discarded scraps of dead fish, but in reality removes huge quantities of…

A new mathematical formula tracks an AI's internal "compass needle" to flag undesirable outputs before they happen.