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By Jacopo Prisco, CNN (CNN) — Scientists have discovered the largest organic molecule containing sulfur — a key ingredient for life — ever identified in interstellar space. The researchers call the discovery a “missing link” in scientists’ understanding of the cosmic origins of life’s chemistry. Sulfur is the 10th most abundant element in the universe

By Amarachi Orie, CNN (CNN) — As the sea ice melts due to climate change, the trend of polar bears getting thinner and having fewer cubs has been well documented in areas such as Baffin Bay, a stretch of ocean between Greenland and Canada’s Baffin Island, and Hudson Bay in northeastern Canada. A population of

By Ashley Strickland, CNN (CNN) — NASA’s Space Shuttle Challenger lifted off 40 years ago with an unusual crew. In addition to six astronauts, the mission took flight with a teacher on board. Christa McAuliffe, the first educator selected for a new Teacher in Space Project, said in a news conference before the flight that

CNN By Kristen Rogers, CNN (CNN) — At the dawn of the nuclear age, scientists created the Doomsday Clock as a symbolic representation of how close humanity is to destroying the world. On Tuesday, nearly eight decades later, the clock was set at 85 seconds to midnight — the closest the timepiece has ever been

CNN By Kristen Rogers, CNN (CNN) — At the dawn of the nuclear age, scientists created the Doomsday Clock as a symbolic representation of how close humanity is to destroying the world. On Tuesday, nearly eight decades later, the clock was set at 85 seconds to midnight — the closest the timepiece has ever been

By Kristen Rogers, CNN (CNN) — At the dawn of the nuclear age, scientists created the Doomsday Clock as a symbolic representation of how close humanity is to destroying the world. On Tuesday, nearly eight decades later, the clock was set at 85 seconds to midnight — the closest the timepiece has ever been to

By Jackie Wattles, CNN (CNN) — When four astronauts begin a historic trip around the moon as soon as February 6, they’ll climb aboard NASA’s 16.5-foot-wide Orion spacecraft with the understanding that it has a known flaw — one that has some experts urging the space agency not to fly the mission with humans on

By Jacopo Prisco, CNN (CNN) — Space junk falling out of orbit and crashing toward Earth is a growing threat. Indeed, old satellites and spacecraft parts reenter our planet’s atmosphere more than three times a day. When these objects burn through the atmosphere, they can release harmful substances, and if they reach Earth’s surface, they

By Andrew Freedman, CNN (CNN) — The frigid temperatures, massive snow and deadly ice storm taking shape east of the Rockies might seem to conflict with life on a rapidly warming planet. But all of these things still happen, even with climate change, and some of them could be even more severe than before when

By Ella Nilsen, CNN (CNN) — As an electricity crunch drives bills higher around the country, big tech companies building power-hungry data centers are increasingly offering to pay for more of the energy they consume, so everyday people don’t get stuck with the bill. At least, that is the message from seven large tech companies

By Katie Hunt, CNN (CNN) — The outline of a hand made with red pigment on the wall of a cave in Indonesia at least 67,800 years ago may be the world’s oldest rock art, according to a new study. The faded hand stencil, along with other spectacular cave paintings on the island of Sulawesi,

By Jackie Wattles, CNN (CNN) — Longtime NASA astronaut Suni Williams announced her retirement Tuesday — officially making the unexpectedly long Boeing Starliner test flight her final foray to orbit as a member of the astronaut corps. Williams, who has set multiple spaceflight records since joining the agency in 1998, did not give insight into

By Ashley Strickland, CNN (CNN) — Astronomers have long searched for clues that a hidden companion star sits out of view near the red supergiant star Betelgeuse. Now, they’ve uncovered a new piece of evidence: a trail like the wake behind a boat, cutting through Betelgeuse’s upper atmosphere, likely forged by the unseen companion. Betelgeuse’s

CNN, ANTONIO J. OSUNA-MASCARÓ, CURRENT BIOLOGY By Taylor Nicioli, CNN (CNN) — How does a cow scratch an itch on its back? An Austrian cow named Veronika has a solution that could change how we view livestock. For the past decade, Veronika has been observed by her owner occasionally picking up sticks with her mouth,

By Ashley Strickland, CNN (CNN) — Powerful solar activity released by the sun reached Earth Monday, causing colorful auroral displays and GPS issues for aircraft, according to the National Weather Service’s Space Weather Prediction Center, or SWPC. A solar radiation storm, ranked at a level four out of five on a severity scale, was tracked

By Taylor Nicioli, CNN (CNN) — How does a cow scratch an itch on its back? An Austrian cow named Veronika has a solution that could change how we view livestock. For the past decade, Veronika has been observed by her owner occasionally picking up sticks with her mouth, maneuvering the ends to reach areas

By Ashley Strickland, CNN (CNN) — Artist, inventor and anatomist Leonardo da Vinci was the definition of a Renaissance man — and scientists are aiming to unlock the secrets of his genius on a genetic level. But there’s just one wrinkle: More than 500 years after his death in 1519, Leonardo’s DNA has proved virtually