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It’s the Latest in Conservation Tech. And It Wants to Suck Your Blood.

It’s the Latest in Conservation Tech. And It Wants to Suck Your Blood.

A leech, Haemadipsa zeylanica, in Thailand. Scientists have found they can survey the biodiversity of a forest with DNA analysis of leeches’ last blood meals.

Already Anticipating ‘Terminator’ Ethics

Already Anticipating ‘Terminator’ Ethics

Fully programmable robots were on display at the Humanoids 2013 conference in Atlanta. The goal is to enable them to work effectively and even autonomously in emergency situations.

Newly Discovered ‘Limb Pit’ Reveals Civil War Surgeons’ Bitter Choices

Newly Discovered ‘Limb Pit’ Reveals Civil War Surgeons’ Bitter Choices

A field technician excavating the remains of an amputated limb at Manassas National Battlefield Park in October 2015. The discovery of two nearly complete sets of soldiers’ remains, 11 partial limbs and other artifacts appeared to date to the Second Battle of Bull Run, which ended Aug. 30, 1862.

A Synthetic Biology Conference Lures an Intriguing Audience

A Synthetic Biology Conference Lures an Intriguing Audience

Neil Gershenfeld of the Massachusetts Institute of Technology says that synthetic biology, which involves the creation of biological systems intended for specific purposes, can generate scientific advances as well as ethical questions.

A Cold War Fought by Women

A Cold War Fought by Women

One of these outfits worn in Dr. Tracy Vaillancourt's study on female aggression provoked a sort of "mean girl" form of indirect aggression. The other attracted little notice at all.

Owls See the World Much Like We Do

Owls See the World Much Like We Do

Even though barn owls have simple brains, a new study suggests they can visually process objects in ways similar to that of animals with more sophisticated perception.

Did Juul Lure Teenagers and Get ‘Customers for Life’?

Did Juul Lure Teenagers and Get ‘Customers for Life’?

Juul is under federal investigation for marketing its discreet, flash-drive-resembling e-cigarette product to youth.

U.F.O.s: Is This All There Is?

U.F.O.s: Is This All There Is?

A U.F.O. in New Mexico in 1957. For astronomers, the biggest problem with alien visitation is not the occasional claim of mysterious light in the sky, but the fact that we’re not constantly overwhelmed with them.

The Thing Inside Your Cells That Might Determine How Long You Live

The Thing Inside Your Cells That Might Determine How Long You Live

A colored transmission electron micrograph of a human serous cell’s nucleus, with its nucleolus in purple. The nucleolus functions as the sort of brain of the nucleus, making rRNA, a basic ingredient for making proteins.

3.6 Degrees of Uncertainty

3.6 Degrees of Uncertainty

Icebergs near Greenland's glaciers, which are speeding up as the climate warms.

Where NASA Put a Parking Lot, Dinosaurs and Mammals Once Crossed Paths

Where NASA Put a Parking Lot, Dinosaurs and Mammals Once Crossed Paths

A nearly 9-foot slab of rock found in a parking lot on the grounds of NASA’s Goddard Spaceflight Center holds the fossilized tracks of several dinosaurs and even a few early mammals.

Trillions Upon Trillions of Viruses Fall From the Sky Each Day

Trillions Upon Trillions of Viruses Fall From the Sky Each Day

Viruses attached to a fragment of a bacterial cell wall. “Viruses modulate the function and evolution of all living things,” scientists wrote last year. “But to what extent remains a mystery.”

Poisonous Prey Turned Into Hunter’s Defense

Poisonous Prey Turned Into Hunter’s Defense

Cnidarians, including corals and many jellyfish, feed and defend themselves with stinging capsules. Some sea slugs have evolved several lines of defense.

A Massacre Frozen in Time: Skeletons in Sweden Reveal Ancient Attack

A Massacre Frozen in Time: Skeletons in Sweden Reveal Ancient Attack

Remains of victims found by archaeologists, who determined the villagers were slaughtered in their homes on the island of Öland in the Baltic Sea.

The Final Hours of the Iceman’s Tools

The Final Hours of the Iceman’s Tools

A showcase reflects a reconstruction of Ötzi’s skull, center, and his body at the South Tyrol Museum of Archaeology in Bolzano, Italy.

Creatures, Strange and Complex, in Colorful Detail

Creatures, Strange and Complex, in Colorful Detail

A change encounter with the colors of a squid.


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