Things to Do in L.A. Tap to enable a layout that focuses on the article. The first woman to pilot a SpaceX Dragon spacecraft and the last to "touch" the Hubble space telescope retired after more than two decades with NASA Some explorers have focused on alpine heights. Megan McArthur is one of the elite few who can say she's piloted both submarines and spacecraft, exploring expanses from the ocean floor to low Earth orbit, looking down on the planet from 250 miles above. Now McArthur, 54, is retiring from NASA, where she has served for more than two decades as an astronaut and senior leader at the agency's Jet Propulsion Laboratory in Houston. Emily Carney, a space historian, described McArthur as a pioneer, one of the first 100 women to fly in space, and someone with a "magnificent career."

Breakthroughs, discoveries, and DIY tips sent every weekday. The yearslong international fight to lay claim to the suspected "world's richest shipwreck" likely won't end anytime soon, especially after a research team's most recent conclusions. Experts have confirmed that dozens of gold coins scattered across the ocean floor off the coast of Colombia belonged to the San José, an ill-fated Spanish treasure galleon that sank over 300 years ago during a battle with British warships. The findings were published on June 10 in the journal Antiquity. In June 1708, the San José and a fleet of 17 other vessels departed the capital of Colombia for Europe laden with gold, silver, and uncut gems.

The mapping of ocean floor layers is a current challenge for the oil industry. Existing solution methods involve mapping through seismic methods and wave inversion, which are complex and computationally expensive. The introduction of artificial neural networks, specifically UNet, to predict velocity models based on seismic shots reflected from the ocean floor shows promise for optimising this process. In this study, two neural network architectures are validated for velocity model inversion and compared in terms of stability metrics such as loss function and similarity coefficient, as well as the differences between predicted and actual models. Indeed, neural networks prove promising as a solution to this challenge, achieving S{\o}rensen-Dice coefficient values above 70%.

The wreck was like a bug on the wall, a jumbly shape splayed on the abyssal plain. It was noticed by a team of autonomous-underwater-vehicle operators on board a subsea exploration vessel, working at an undisclosed location in the Atlantic Ocean, about a thousand miles from the nearest shore. The analysts belonged to a small private company that specializes in deep-sea search operations; I have been asked not to name it. They were looking for something else. In the past decade, the company has helped to transform the exploration of the seabed by deploying fleets of A.U.V.s--underwater drones--which cruise in formation, mapping large areas of the ocean floor with high-definition imagery.

The Arcane Kids, a video game collective from Los Angeles, have a manifesto that I think about all the time, but particularly when I find art that surprises me, or approaches traditional formats in new and exciting ways. The second line simply states: "The fastest way to the truth is a joke." Another Crab's Treasure, the second offering from indie Australian studio Aggro Crab, is full of truth and jokes – and something else, something rarer, too. Another Crab's Treasure is ostensibly a combat-oriented adventure game, in which you play a tiny hermit crab whose shell has been stolen. You must explore the depths of the ocean to find a way to retrieve it from the Loan Shark, so you can return the wee crab to his peaceful life in the tide pools on the shore.

A combination of AI, a wild 1970s plan to build underwater cities, and a designer creating furniture on the seabed around the Bahamas might be the solution to the widespread destruction of coral reefs. It could even save the world from coastal erosion. Industrial designer Tom Dixon and technologist Suhair Khan, founder of AI incubator Open-Ended Design, are collaborating on regenerating the ocean floor. "Coral reefs are endangered by climate change, shipping, development, and construction--but they're vital," Khan explains. "They cover 1 percent of the ocean floor, but they're home to more than 25 percent of marine life."

When the Titan submersible, carrying five sightseers to the wreck of the Titanic, blew up thousands of metres under the ocean surface in June, it underscored why humanity knows more about the surface of some other planets than about the depths of the Earth's oceans. Oceans cover more than 70 percent of the earth's surface. Yet, this underwater world is a challenging place to explore, as the Titan disaster showed. The deepest point under water, the Challenger Deep in the Pacific Ocean, is 11,000 metres deep, more than the height of Mount Everest. The light doesn't penetrate to such depths.

Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. The International Seabed Authority -- the United Nations body that regulates the world's ocean floor -- is preparing to resume negotiations that could open the international seabed for mining, including for materials critical for the green energy transition. Years long negotiations are reaching a critical point where the authority will soon need to begin accepting mining permit applications, adding to worries over the potential impacts on sparsely researched marine ecosystems and habitats of the deep sea. Here's a look at what deep sea mining is, why some companies and countries are applying for permits to carry it out and why environmental activists are raising concerns.

"A debris field was discovered within the search area by an ROV near the Titanic," the USCG said just before noon. ROV stands for remotely operated vehicle. Experts were evaluating the information. The Titan lost contact with its surface vessel, the Polar Prince, around 1 hour and 45 minutes into its dive Sunday morning, about 900 miles east of Cape Cod, Massachusetts, and around 400 miles southeast of St John's, in Canada's Newfoundland. "We understand debris has been found which may be the landing frame and a rear cover of the tail instrument compartment of The Titan lost on previous dives," Richard Garriott, the president of the Explorers Club which had members on the missing sub, wrote to the group, according to a spokesman. "We hear there may be additional debris, but no updated visuals of the submersible." This file image provided by OceanGate shows the Titan submersible descending into the ocean.

Fox News correspondent Molly Line has more on the search to rescue the five individuals on the Titanic voyage on'Special Report.' BOSTON – Three new vessels arrived "on-scene" in the Atlantic Ocean Wednesday morning to join search and rescue efforts for the missing OceanGate Titan sub as the estimated oxygen supply on board continues to dwindle. The U.S. Coast Guard said the new vessels bring additional tools to scan the ocean floor as they race against the clock to save the five people onboard: OceanGate CEO Stockton Rush, British businessman Hamish Harding, father-and-son Shahzada and Suleman Dawood, who are members of one of Pakistan's wealthiest families, and Paul-Henry Nargeolet, a former French navy officer and leading Titanic expert. "The John Cabot has side-scanning sonar capabilities and is conducting search patterns alongside the Skandi Vinland and the Atlantic Merlin," the Coast Guard said. The John Cabot is a Canadian coast guard vessel, the Atlantic Merlin is a Canadian remotely operated vehicle (ROV), and the Skandi Vinland is a commercial ROV, authorities said.