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By Amy O’Kruk and Angela Dewan, CNN (CNN) — No, it’s not your imagination — summers in the US really are getting hotter. And longer. Human-caused climate change is turbocharging heat all over the country, but it’s most intense in cities, where more than 260 million Americans live. That’s because buildings, roads and sidewalks radiate

By Ashley Strickland, CNN (CNN) — Data from a retired NASA mission has revealed evidence of an underground reservoir of water deep beneath the surface of Mars, according to new research. A team of scientists estimates that there may be enough water, trapped in tiny cracks and pores of rock in the middle of the

By Taylor Nicioli, CNN (CNN) — Spiders have a reputation for giving some humans a fright, but a team of scientists has flipped the script to learn why one increasingly visible species seems to have an edge on handling stress. Jorō spiders — which have been spreading across the southeastern United States since their first appearance in

By Barbie Latza Nadeau, CNN Rome (CNN) — The skeletal remains of a man and a woman have been unearthed in Pompeii, along with a cache of coins and precious jewelry, archaeologists say. The discovery is part of a dig in Region IX of the buried city that has uncovered a plethora of ancient buildings

CNN By Amy Gunia and Alkira Reinfrank, CNN (CNN) — Some 400 kilometers (250 miles) from the nearest sea, engineering students at Switzerland’s ETH Zurich are hard at work on cutting-edge robots that may change the way the world’s oceans are studied. “Eve” the robotic fish swings its silicone tail side to side, powered by

By Amy Gunia and Alkira Reinfrank, CNN (CNN) — Some 400 kilometers (250 miles) from the nearest sea, engineering students at Switzerland’s ETH Zurich are hard at work on cutting-edge robots that may change the way the world’s oceans are studied. “Eve” the robotic fish swings its silicone tail side to side, powered by pumps

By Riane Lumer, CNN (CNN) — It’s that time of summer to watch the most anticipated meteor shower of the year: the dazzling display known as the Perseids. Streams of light and color will travel across the sky while explosions of fireballs linger, leaving behind even brighter streaks than the meteor trails from the Perseids

By Lou Robinson and Angela Dewan, CNN (CNN) — The Paris Olympics opened with rain on its parade, then blistering heat and, finally, a week of pleasant sunshine. As it comes to a close on Sunday, temperatures are expected to again soar up to 95 degrees Fahrenheit, or 35 degrees Celsius. The only certainty about

By Alaa Elassar, CNN South Island, New Zealand (CNN) — Justin Parkin-Rae takes a break from pulling chunks of weeds from around one of the many rivers that snake through Kaikōura, a quaint fishing town on the east coast of New Zealand’s South Island, named Te Waipounamu in his native Māori language. His jade necklace and red hair

By Ashley Strickland, CNN (CNN) — The human story became a bit more complicated about two decades ago. In 2003, archaeologists excavating inside Liang Bua, a cave on the Indonesian island of Flores, found a tiny humanlike skull. More bones followed, and at first, archaeologist Thomas Sutikna and his team thought they had uncovered the

By Ashley Strickland, CNN (CNN) — Excavations and metal-detecting work at the site of a famous ship burial in Suffolk, England, have revealed missing pieces that could help archaeologists better understand an intriguing but incomplete sixth century artifact. A team of archaeologists, volunteers and conservators unearthed additional fragments of a Byzantine bucket at Sutton Hoo,

By Ashley Strickland, CNN (CNN) — One of China’s Long March 6A rockets has broken apart in low-Earth orbit and created a debris cloud consisting of hundreds of pieces, according to multiple space debris-tracking entities. The rocket launched from the Taiyuan Satellite Launch Center on Tuesday to deliver 18 G60 satellites into orbit, which marks

By Jackie Wattles, CNN (CNN) — When astronauts Suni Williams and Butch Wilmore left Earth for International Space Station nearly three months ago, they ditched their bags for a key piece of equipment. Helming the inaugural crewed flight test of Boeing’s Starliner spacecraft, they departed without their own toiletries and other personal comforts — expecting

By Kara Fox, CNN (CNN) — A coating 100 times thinner than a human hair could be “ink-jetted” onto your backpack, cell phone or car roof to harness the sun’s energy, new research shows, in a development that could reduce the world’s need for solar farms that take up huge swaths of land. Scientists from

By Taylor Nicioli, CNN (CNN) — The ongoing excavation of an ancient Greek city in western Turkey has uncovered artifacts and archaeological remains dating as far back as the fifth century BC — including a pot filled with an undisclosed number of valuable gold coins that was hidden away for more than 2,000 years. Researchers

CNN By Alexandra Banner, CNN (CNN) — Government officials often send text messages as an effective means of warning the public about emergencies. But in New York City, some residents are receiving weather warnings from a voice in the sky as drones equipped with loudspeakers are being deployed to specific neighborhoods prone to flooding. Here’s

By Jackie Wattles, CNN (CNN) — Butch Wilmore and Suni Williams — two veteran NASA astronauts piloting the first crewed test flight of Boeing’s Starliner spacecraft — have now been in space for 63 days, roughly seven weeks longer than initially expected. There is still no clear return date in sight, and NASA is now making

By Jack Guy, CNN (CNN) — Scientists studying squaretail grouper have found that the increasing presence of fishermen in the water is changing their behavior from flirty to flighty. A team led by scientists at Lancaster University in the UK found that the fish are becoming more scared of humans and spending less time on

By Jackie Wattles and Kristin Fisher, CNN (CNN) — The launch of SpaceX’s Crew-9 mission, an endeavor planned to ferry four astronauts to the International Space Station — which could also serve as a backup vehicle for the crew assigned to Boeing’s troubled Starliner spacecraft — will be delayed, NASA announced Tuesday. The space agency

By Katie Hunt, CNN (CNN) — A hobbit-size species of ancient human that lived on the Indonesian island of Flores until about 50,000 years ago baffles scientists in several ways. First unearthed in a startling discovery nearly 21 years ago, Homo floresiensis, the scientific name for the extinct species, challenged the idea that human evolution