What's the size of the Milky Way galaxy? Learn how, depending on your definition, the size can change. 

Learn why killer whales sometimes wear dead salmon on their heads, and what that might mean.

Learn why playing classic video games, like Super Mario Bros. and Yoshi, can help young adults fight burnout and chronic stress.

Learn more about the people who once used Grotta della Monaca as a sacred burial site.

Learn more about the most exciting species found around the world in 2025, from the deep sea to the western Himalayas.

Learn how smiling — and mimicking other people’s smiles — can make you seem more trustworthy and confident.

Learn how we know the Earth is round, and the science behind the shape of our gravitational field.

Learn how ancient pottery covered in flowers may be humanity’s first attempts at mathematical thinking.

Learn more about PSR J2322-2650b, a lemon-shaped exoplanet that may be in a toxic relationship with its host star. 

Learn how researchers discovered what may be the oldest Palaeoloxodon antiquus tracks in Europe.

Learn more about the thousands of dinosaur tracks uncovered on the side of an Italian mountain, and what they tell us about how these dinosaurs moved. 

Learn about the new flu variant, subclade K, that is circulating several countries and why this winter 2025-2026 flu season is more severe.

Learn more about the death rituals seen throughout the animal kingdom and whether or not animals grieve the same way humans do.

Learn how drone-based sampling is opening a new window into whale health in remote Arctic regions.

Learn how ants traded individual protection for collective power — and what it reveals about how complex societies evolve.

DNA from Icelandic lava flows reveals how microbes move into a brand-new habitat, offering insights into early life on Earth and volcanic worlds like Mars.

Learn how you can say farewell to comet 3I/ATLAS as it passes by Earth on Dec. 19, 2025, and what we have learned during its brief visit near Earth.

Learn how parasites preserved in an ancient sewer reveal how disease spread among Roman soldiers.

Learn how psychology experiments suggest swearing increases focus and confidence during demanding tasks.

Learn about a new simulation that shows human-to-human transmission of H5N1 will become uncontainable if we miss the narrow window.

Learn how mosquitoes can capture a snapshot of wildlife across an entire landscape.

Learn about the collisions between space rocks that have created huge dust clouds, one of which was previously mistaken for an exoplanet. 

Learn what this seven-armed cephalopod loves to eat and how it catches its prey. 

Learn about what may be the first ever superkilonova ever observed, emitting gravitational waves that hint at the collision of two dead stars.