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By Ashley Strickland, CNN (CNN) — After a steep monthslong trek, the Perseverance rover has reached the top of Jezero Crater on Mars. The site is a region unlike anything Perseverance has encountered during its 3 ½-year journey on the red planet. Now, the robotic explorer is preparing to observe some of the oldest rocks

By Laura Paddison, CNN (CNN) — The nearly 3 million rivers that weave across the world are experiencing rapid and surprising changes, with potentially drastic implications for everything from drinking water supplies to flood risks, according to a new study. Scientists mapped the flow of water through every single river on the planet, every day

By Julianna Bragg, CNN (CNN) — A male humpback whale has made an extraordinary journey from South America to Africa — traveling more than 13,046 kilometers (8,106 miles) — the longest migration recorded for a single whale, a new study found. The intrepid marine giant’s trek also marks the first documentation of an adult male

By Gina Park, CNN (CNN) — It’s that time of the year again. Sky-gazers may get the chance to glimpse some of the dozens of meteors that will streak across the sky as the annual Geminid meteor shower reaches its peak. The Geminids are expected to be most active between noon and 8 p.m. ET

By Ashley Strickland, CNN (CNN) — A type of bacteria called Deinococcus radiodurans, nicknamed “Conan the Bacterium” for its ability to survive the harshest of extremes, can withstand radiation doses 28,000 times greater than those that would kill a human being — and the secret to its success is rooted in an antioxidant. Now, scientists

By Rachel Ramirez, CNN (CNN) — Every winter, millions of monarch butterflies journey thousands of miles across North America to spend winters in the forests and mountains of central Mexico. But over the years, the beloved butterfly has seen such a troubling decline in its population that US wildlife officials on Tuesday announced a proposal

By Lex Harvey, CNN (CNN) — Anton van Helden, an expert on some of the world’s rarest whales, was sitting on the couch in July recovering from surgery, when a photo flashed on his phone that would change the course of his career. But this was no ordinary whale. “I immediately went, ‘Oh my goodness,

By Ashley Strickland, CNN (CNN) — A mineral trapped within a Martian meteorite that fell to Earth has revealed traces of water on Mars that date back 4.45 billion years, according to new research. The zircon grain may contain the oldest direct evidence of ancient hot water on the red planet, which may have provided

By Ashley Strickland, CNN (CNN) — An enduring mystique surrounds the Voyager 1 and 2 probes. Launched two weeks apart in 1977, the twin probes changed the way we see our solar system, sending back stunningly detailed views of Jupiter, Saturn, Neptune and Uranus. More than 47 years later, both spacecraft are still exploring the

By Mindy Weisberger, CNN (CNN) — Fashion is fickle and styles come and go — even for orcas, apparently. In 1987, a group of killer whales off the northwestern coast of North America briefly donned salmon “hats,” carrying dead fish on their heads for weeks. Recently, a male orca known as J27, or “Blackberry,” was

By Jackie Wattles, CNN (CNN) — President-elect Donald Trump’s pick for NASA administrator — tech billionaire and spaceflight trailblazer Jared Isaacman — is sending shock waves through the space community, eliciting excited responses from industry leaders who view Isaacman as a changemaker as well as concerns about conflicts of interest. Isaacman, who has twice traveled

By Alex Rodway, CNN (CNN) — On one of his first trips to study wolves in Ethiopia in the late 1980s, biologist Claudio Sillero observed a highly unusual behavior: these local predators were deliberately licking the vibrant flowers of the red hot poker plant that grows in the country’s highlands. Relatively few mammals have been

By Issy Ronald, CNN (CNN) — Ancient ancestors of Native Americans, known as the Clovis people, mostly ate mammoths and other large animals during the most recent ice age, according to a new study. Scientists examined the chemical signatures left by food items in the remains of an 18-month-old child who was buried about 13,000

By Laura Paddison, CNN (CNN) — Millions of tons of coal ash leftover from burning the planet’s dirtiest fossil fuel are sitting in ponds and landfills, able to leach into waterways and pollute soil. But this toxic waste may also be a treasure trove for the rare earth elements needed to propel the world toward

By Laura Paddison, CNN (CNN) — Last year was the hottest on record, oceans boiled, glaciers melted at alarming rates, and it left scientists scrambling to understand exactly why. They know the extraordinary heat was fueled by a number of factors, predominantly planet-heating pollution from burning fossil fuels and the natural climate pattern El Niño.

By Jackie Wattles and Kristin Fisher, CNN (CNN) — NASA’s Artemis program, which aims to return astronauts to the moon this decade amid a renewed international push for lunar exploration, is facing more delays. The agency said Thursday that a planned mission to land on the moon in 2026 will now take place no earlier

By Amy Gunia and Hazel Pfeifer, CNN (CNN) — The patient is submerged in an ice bath as an anesthetic for its impending surgery. When sufficient numbness is achieved, University of Queensland student Lachlan Fitzgerald begins the procedure, carefully attaching a tiny circuit board to its back to create a part-living, part-machine biohybrid robot. The

By Katie Hunt, CNN (CNN) — Tiny artifacts unearthed at a Wyoming site where a mammoth was butchered 13,000 years ago are revealing intriguing details about how the earliest Americans survived the last ice age. Archaeologists found 32 needle fragments made from animal bone buried almost 15 feet (nearly 5 meters) underground at the La

By Rosa Rahimi, CNN London (CNN) — The dynamics between predator and prey are laid bare in a striking image of fish being attacked by sharks in the shallow waters of the Maldives, which has claimed the top prize in this year’s Royal Society Publishing Photography Competition. Photographer Angela Albi, a postdoctoral researcher at the

By Ashley Strickland, CNN (CNN) — NASA engineers have successfully restored contact with Voyager 1 and the spacecraft is operating normally after its dwindling power supply caused a weekslong blackout. The issue began in October when the aging probe automatically switched from its primary X-band radio transmitter and began relying on a much weaker S-band