Predawn moon above the Scorpion’s Stinger on March 5

On the morning of March 5, the moon passes two stars in the tail of the constellation Scorpius. They are sometimes called The Stinger.

Ruins of Perperikon, ancient city of the Thracians

Human activity at Perperikon, sometimes referred to as the European Machu Picchu, dates back to 5,000 B.C.

What causes sinkholes?

And where else in the U.S. might be vulnerable to sinkholes?

Cassini spies Venus from Saturn’s orbit

A distant world gleaming in sunlight, Earth's twin planet, Venus, shines like a bright beacon in images taken by NASA's Cassini spacecraft in orbit around Saturn.

Creating new tissue instead of transplanting hearts

Substances have been developed which allow scientists to create fully functional heart cells.

Man reunites with gorilla after five years apart

Conservationist Damien Aspinall reunites with the gorilla he raised, five years after the gorilla was released into the wild.

Scientists describe case of child born with HIV, now cured

It's the first documented case of a child born with HIV and later cured with aggressive drug treatment.

Twilight over the West Philippine Sea

Twilight over the West Philippine Sea by EarthSky Facebook friend Jv Noriega.

HPC changes name to Weather Prediction Center

The Hydrometeorological Prediction Center (HPS) will be called the Weather Prediction Center starting March 5. It is easier to say, spell, and remember.

Snowflakes on wood

One of the few upsides to the recent snow storms has been the beautiful snowflake images we have received through e-mail and Facebook.