December birthstone: turquoise, zircon or tanzanite

The December birthstone is either the exquisite blue-green turquoise, dazzling zircon, or the magnificent blue-violet tanzanite. Your choice!

Audubon Christmas Bird Count starts December 14

The Audubon Christmas Bird Count, held each winter, is one of the longest-running community science projects. You can help collect important data about birds.

La Palma volcano has been erupting for 2 months

The La Palma volcano - which began on September 19, 2021 - has now been erupting for 2 months. It has claimed one life and forced thousands to evacuate.

Virtual reality can combat isolation on Earth and in space

Virtual reality may help alleviate some of the negative feelings of isolation, and this has potential implications for space travel.

Kessler syndrome in real life? ISS astronauts shelter from debris

Space debris threatens ISS: the Kessler syndrome, a theory developed by NASA scientist Donald Kessler, predicts cascading collisions in orbit.

Permafrost thaw in the Arctic, in the next 30 years

Permafrost thaw in the Arctic is as one of the most immediate problems of global warming. A new assessment of communities at risk.

Halley’s Comet and Edmond Halley’s magnificent prediction

Born on today's date in the year 1656, Edmond Halley was the first to predict the return of a comet. Today, Halley's Comet bears his name.

Chaco Canyon in New Mexico, and its astronomical rock art

Chaco Canyon aka Chaco Culture National Historical Park, New Mexico, contains astronomical rock art that documents what the people of the time saw in the sky.

November birthstone: the topaz

The November birthstone, topaz, comes in a myriad of colors. It's a much-loved gemstone in jewelry, and myths that date to ancient times.

Halloween is an astronomical holiday

The 4 cross-quarter days fall between equinoxes and solstices. Halloween is the spookiest one. It comes from a festival of ancient Celts and Druids.