How did dogs get to the Americas?
The history of dogs has been intertwined, since ancient times, with that of the humans who domesticated them.
But how far back does that history...
Ancient relic points to a turning point in Earth’s history 42,000 years ago
Just like in The Hitchhiker’s Guide to the Galaxy, the answer was 42.
The temporary breakdown of Earth’s magnetic field 42,000 years ago sparked major...
Like it or not, taxes and bureaucracy are cornerstones of democracy, shows history
The media has been rife with stories about democracy in decline: the recent coup in Myanmar, the ascent of strongman Narendra Modi in India,...
Scientists explain the cataclysm that killed the dinosaurs
It was tens of miles wide and forever changed history when it crashed into Earth about 66 million years ago.
The Chicxulub impactor, as it’s...
Did a comet wipe out the dinosaurs?
About 66 million years ago a massive chunk of rock slammed into Earth in what is the modern-day Yucatan Peninsula.
The impact extinguished about 75%...
Venus was once more Earth-like, but climate change made it uninhabitable
We can learn a lot about climate change from Venus, our sister planet.
Venus currently has a surface temperature of 450℃ (the temperature of an...
What killed the dinosaurs and where did it come from?
It forever changed history when it crashed into Earth about 66 million years ago.
The Chicxulub impactor, as it's known, left behind a crater off...
To figure out how dinosaurs walked, start with how they didn’t
Paleontologists have made great strides in understanding how extinct animals like dinosaurs walked, ran, swam and flew when they were alive—but much about the...
How tiny plants changed the planet, 488 million years ago
Nearly 500 million years ago, Earth's lowland landscapes were dominated by vast sandy, gritty plains.
They then underwent a major, irreversible change, after which these...
Women’s menstrual cycles synchronize with moon cycles, study shows
In a new study, researchers used scientific methods to examine the connection between lunar and women's menstrual cycles.
They suggest that in ancient times, human...