Farmers turn to seaweed in attempt to reduce methane emissions from livestock

One of the largest challenges facing India: how to sustain food production for 1.4 billion people amid deteriorating soil quality, diminishing water supplies and climate change. For some, including hundreds of artificial intelligence startup companies, the challenge represents a business opportunity. From India, Fred de Sam Lazaro reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders

OpenAI, the company behind ChatGPT, is one of the most famous and secretive companies in the world working to develop artificial general intelligence that would match or surpass the cognitive abilities of humans across every task. Investigative journalist Karen Hao joins Ali Rogin to discuss her new book, “Empire of AI: Dreams and Nightmares in Sam Altman’s OpenAI," which delves into the company. PBS News is supported by - https://www.pbs.org/newshour/about/funders

A group of gray seals in Rhode Island are making a splash. They were rescued in March and April after becoming entangled in fishing gear and other debris near Block Island. Several were recently released after being rehabilitated. John Yang has the story. PBS News is supported by - https://www.pbs.org/newshour/about/funders

Sharks have been cast as the ultimate villain ever since the movie “Jaws” was released 50 years ago this summer. The film tells the story of a great white shark terrorizing beachgoers, but in reality, humans pose the greater threat to sharks. Ali Rogin speaks with endurance swimmer Lewis Pugh, who wants to get that message out by swimming around Martha’s Vineyard, where “Jaws” was filmed. PBS News is supported by - https://www.pbs.org/newshour/about/funders

The EPA has reportedly drafted a plan to eliminate all limits on greenhouse gas emissions from power plants, according to documents obtained by The New York Times. Now, with the rise of artificial intelligence technology, demand on power plants is increasing, in large part due to AI’s reliance on data centers. Ali Rogin speaks with Kenza Bryan, climate reporter for The Financial Times, for more. PBS News is supported by - https://www.pbs.org/newshour/about/funders

In a remote part of Alaska, global warming is being blamed for endangering a treasure trove of Indigenous artifacts. Archaeologists at one dig site near the Bering Sea say they’re in a race against time. Nelufar Hedayat reports for the nonprofit news organization Evident Media. PBS News is supported by - https://www.pbs.org/newshour/about/funders

Earlier in April, doctors at the National Institutes of Health made a promising step in the fight against cancer, announcing an immunotherapy treatment was able to shrink gastrointestinal tumors for about a quarter of patients. But NIH staffing shortages, layoffs and cuts are threatening to delay the rollout of this promising development. William Brangham speaks with Dr. Steven Rosenberg for more. PBS News is supported by - https://www.pbs.org/newshour/about/funders

Coral reefs are a crucial part of the marine ecosystem, providing habitats for all sorts of marine life and protecting coastlines from storm damage. But scientists say rising ocean temperatures are posing a grave threat to the future of the world’s reefs. Ali Rogin reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders

After more than a decade of mapping billions of stars across the Milky Way and beyond, a groundbreaking spacecraft is retiring. The European Space Agency’s space-based observatory known as Gaia is leaving behind a legacy of stunning discoveries that changed what we know about the universe. John Yang reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders

As the world races to curb climate change, scientists are taking aim at cows, a surprisingly potent source of greenhouse gases. Science correspondent Miles O’Brien traveled from California to Mexico and Australia to explore a bold idea that could make a big impact. It's part of our series, Tipping Point. PBS News is supported by - https://www.pbs.org/newshour/about/funders