Great Backyard Bird Count begins February 14

Most red bird with dark feathers on a tree branch.

View at EarthSky Community Photos. | Lynzie Flynn of Fountain Valley, California, submitted this image on December 22, 2024, and wrote: “This is an adult male Vermilion Flycatcher. It was flying from tree to tree and posing for me. It’s such a colorful bird and one of the few colorful birds we see in my … Read more

Juvenile sea turtles might be active swimmers

A small turtle with a rectangular tracker on its back. Somebody is holding the animal.

Juvenile sea turtles are active swimmers! Video via EarthSky. Scientists have long thought that young sea turtles – after hatching on the shore and making their way into the ocean – drifted passively on currents. But the University of Florida said on February 6, 2025, that these juvenile sea turtles might be active swimmers. A … Read more

New method to cryopreserve drone semen

Bee on a plant with yellow background.

Bee-reaking news: Belgian scientists have developed a simple method to cryopreserve the semen of drones, the male equivalent of honey bees (Apis mellifera). As part of the FreezeBEE project at the University of Liège, the researchers then thawed the semen and successfully artificially inseminated queens. It resulted in a female brood with an equivalent viability to … Read more

Dancing turtles reveal how animals navigate magnetic fields

A close up image of a brown baby turtle, which can navigate using magnetic fields, held gently between someone's fingers.

UNC-Chapel Hill researcher holding a juvenile loggerhead sea turtle. Credit: Ken Lohmann, UNC-Chapel Hill I can’t imagine what it would be like to sense a magnetic field. But a new study has presented the first evidence that loggerhead turtles (Caretta caretta) use magnetic fields as a compass to determine direction and also use it to … Read more

How scientists spotted that most energetic neutrino

Newsletter

Recent research on lightweight particles called neutrinos might have passed you by – much like the more than 10 trillion neutrinos passing through your body each second. Now, our new paper – with 21 countries, more than 60 institutes and around 360 scientists contributing – reports the observation of the most energetic neutrino yet. Despite … Read more

To Probe the Interior of Neutron Stars, We Must Study the Gravitational Waves from their Collisions

When massive stars reach the end of their life cycle, they undergo gravitational collapse and shed their outer layers in a massive explosion (a supernova). Whereas particularly massive stars will leave a black hole in their wake, others leave behind a stellar remnant known as a neutron star (or white dwarf). These objects concentrate a … Read more

The JWST Gives Us Our Best Image of Planets Forming Around a Star

This is a colour-enhanced image of millimetre-wave radio signals from the ALMA observatory from previous research. It shows the PDS 70 star and both exoplanets. Image Credit: A. Isella, ALMA (ESO/NAOJ/NRAO)

Planets are born in swirling disks of gas and dust around young stars. Astronomers are keenly interested in the planet formation process, and understanding that process is one of the JWST’s main science goals. PDS 70 is a nearby star with two nascent planets forming in its disk, two of the very few exoplanets that … Read more

Gamma rays create Red Hulk in Captain America: Brave New World, but how do they work in the real world?

A comic book still showing a huge red-skinned man with an angry expression, surrounded by fire.

Captain America: Brave New World opens in theaters globally on Valentine’s Day 2025, bringing with it a popular expansion to Hulk-lore, the Red Hulk. Like all Hulks across various forms of media, there is a good chance that the origins of the Red Hulk in the latest installment of the Marvel Cinematic Universe (MCU) are … Read more

Warming climate making crocodiles hotter with unknown effect

A crocodile moves along a river bank towards the water

Andrea the crocodile. Credit: Australia Zoo Crocodiles in northern Australia are altering their behaviour to try to keep cool as they experience increasingly stressful temperature extremes driven by climate change. New research has revealed that saltwater crocodiles (Crocodylus porosus) are spending more time at or close to their critical thermal limit of 32-33°C, diving less … Read more

The Euclid Space Telescope Captures a Rare, Stunning Einstein Ring

Sometimes, things across the vast Universe line up just right for us. The Einstein Ring above, like all Einstein Rings, has three parts. In the foreground is a distant massive object like a galaxy or galaxy cluster. In the background, at an even greater distance away, is a star or another galaxy. We’re the observers, … Read more