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The X and Y chromosomes determine sex development in almost all mammals.

Weird chromosome loss found in these creeping voles

By Stephanie Pappas published

Creeping voles lost their Y chromosome, but they don't seem to be missing the sex chromosome.

Evolution
An artist's depiction of Archaean islands.

First life could have evolved on ancient islands

By Stephanie Pappas published

Earth could have hosted islands as long as 4 billion years ago, leaving open the possibility that the first life could have evolved on land rather than near hydrothermal vents.

Evolution
lightning striking Earth

The electric hum of life may have originated with primordial lightning

By Mara Johnson-Groh published

A low-frequency hum in our cells syncs may have synced with ancient sky bolts.

Evolution
Streptococcus pneumoniae

New drugs could stymie superbugs by freezing evolution

By Nicoletta Lanese published

Scientists aim to stay the spread of antibiotic resistance by messing with how bacteria evolve.

Evolution
a man looking up at night sky

Humans May Be the Only Intelligent Life in the Universe, If Evolution Has Anything to Say

By Nick Longrich published

A look at 4.5 billion years of Earth's history tells us that intelligence, including extraterrestrial intelligence, is unlikely to evolve.

Evolution
Friends looking at phones

Humans Are Growing Weird, Bone Spikes on Their Skulls. Smartphones May Be the Culprit.

By Laura Geggel published

Evolution
The fabella (white arrows), a tiny bone hidden in the tendon of the knee, is increasing in prevalence in the population.

This Tiny Knee Bone Had Nearly Vanished As Humans Evolved. It's Coming Back

By Yasemin Saplakoglu published

Why is this tiny bone making a comeback?

Evolution
Denisova Cave discoveries

This Newfound Extinct Human Lineage Also Mated with Modern Humans

By Charles Q. Choi published

An entirely new lineage of the mysterious human relatives called Denisovans has been discovered.

Evolution
Neanderthal man

How smart were Neanderthals?

By Megan Gannon published

Our extinct cousins have a lousy reputation that's being overturned by new discoveries.

Evolution
African elephants.

Humans Are Eating Most of Earth's Largest Animals to Extinction

By Brandon Specktor published

Humans are hunting and eating 60 percent of Earth's largest animals into an early grave.

Evolution
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