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By Megan Marples, CNN For these tiny robotic crabs, being small is a virtue. Engineers at Northwestern University in Evanston, Illinois, invented the world’s smallest remote-controlled walking robot, according to research published in the journal Science Robotics. Each one is about half a millimeter wide, which is smaller than the thickness of a United States

CNN, NITZA ROCHEZ, GETTY IMAGES, MOUNT SINAI HEALTH SYSTEM By Rob Picheta and Hafsa Khalil, CNN Vaccines, variants, natural immunity and better treatment options mean catching Covid-19 now isn’t the same as it was a year or two ago. But for millions of people who contracted the virus even in the pandemic’s first months, the

ZIMY DA KID , INSTAGRAM @ZIMYDAKID, UNIVERSAL PICTURES (JAWS), CNN VIA WEBEX, VARIOUS INSTAGRAM COMMENTS, CNN By Katie Hunt, CNN NASA’s Earth Observatory has released satellite images of an undersea volcano erupting. The image, taken on May 14 by the Operational Land Imager 2 on the Landsat 9 satellite, shows a plume of discolored water

By Katie Hunt, CNN NASA’s Earth Observatory has released satellite images of an undersea volcano erupting. The image, taken on May 14 by the Operational Land Imager 2 on the Landsat 9 satellite, shows a plume of discolored water being emitted from the submarine volcano. The satellite is designed to capture high-resolution images of our

By Ashley Strickland, CNN Measuring the expansion rate of the universe was one of the Hubble Space Telescope’s main goals when it was launched in 1990. Over the past 30 years, the space observatory has helped scientists discover and refine that accelerating rate — as well as uncover a mysterious wrinkle that only brand-new physics

By Zoe Sottile, CNN Things are looking up for the greater one-horned rhino. The massive mammal, also called the Indian rhinoceros, saw its global population reach its highest level since the 1980s, according to the International Rhino Foundation, a Texas-based nonprofit focused on rhino conservation. There are now a total of 4,014 greater one-horned rhinos

By Katie Hunt, CNN Have you ever wondered whether, tens of thousands of years from now, you could end up in the fossil record? I confess I have. It’s definitely a long shot. The vast majority of animals that have lived on the planet don’t end up encased in stone or with their skeletons preserved

CNN By Katie Hunt, CNN Have you ever wondered whether, tens of thousands of years from now, you could end up in the fossil record? I confess I have. It’s definitely a long shot. The vast majority of animals that have lived on the planet don’t end up encased in stone or with their skeletons

KOVR By Katie Hunt, CNN There is a lot to love about bees. They are crucial to growing many of our favorite and healthiest foods as they move pollen from plant to plant, pollinating more than a hundred fruits and vegetables including strawberries, potatoes and apples. Unfortunately, many bee species are under threat as a

By Katie Hunt, CNN There is a lot to love about bees. They are crucial to growing many of our favorite and healthiest foods as they move pollen from plant to plant, pollinating more than a hundred fruits and vegetables including strawberries, potatoes and apples. Unfortunately, many bee species are under threat as a result

Story by Reuters In a world beset by conflicts and natural disasters, the number of people who fled their homes and sought shelter within their own countries hit a record high of close to 60 million by the end of last year, according to new data. Disasters, including weather events such as cyclones and floods

CNN Story by Reuters In a world beset by conflicts and natural disasters, the number of people who fled their homes and sought shelter within their own countries hit a record high of close to 60 million by the end of last year, according to new data. Disasters, including weather events such as cyclones and

By Ashley Strickland, CNN The unexpected discovery of “ghost” fossils belonging to tiny, ancient organisms could provide insights about how life reacts to climate change in Earth’s oceans. Looking through a powerful microscope, researchers were stunned to see the impressions left by single-celled plankton, or fossilized nannoplankton, that lived millions of years ago — especially

By Katie Hunt, CNN In the Red Sea off the coast of Egypt, bottlenose dolphins were spotted in 2009 doing something unusual. They lined up to rub their bodies against coral. They were choosy about which type of corals they rubbed against, noticed wildlife biologist Angela Ziltener, a guest researcher at the University of Zurich

By Ashley Strickland, CNN The Solar Orbiter mission’s first close pass of the sun in March has revealed our star in a new light. The spacecraft, which flew by the sun on March 26, has returned a treasure trove of new images and insights after coming within one-third the distance from the sun to the