Forthcoming cost estimate for budget-busting mission could lead to strict caps from Congress
Researchers feel increasingly isolated as government moves to restrict internet access
Nature looks at the detective work required to confirm a controversial claim of finding interstellar debris.
A research team made headlines last week when it claimed to have scooped up from the sea floor fragments of a meteorite that came from beyond our Solar System1. Finding such an interstellar sample on Earth would be exciting because it might shed light on how planets and stars beyond our own form. But a number of scientists say that the evidence that the material came from another planetary system is not convincing so far.
| AI detects eye disease and risk of Parkinson’s from retinal images Researchers have developed a model trained similarly to ChatGPT that can be adapted to evaluate multiple health conditions. Mariana Lenharo |
| Ancient-human fossils sent to space: scientists slam ‘publicity stunt’ The decision to send hominin bones on a commercial spaceflight has raised eyebrows among human-evolution researchers. Ewen Callaway |
Submarine flows from the Hunga Tonga–Hunga Ha‘apai eruption decimated seafloor cables
In December 2021, an undersea volcano in the southern Pacific Ocean, the Hunga Tonga–Hunga Ha‘apai (hereafter called the Hunga volcano) began erupting. In January 2022 the eruption reached a powerful climax, triggering atmospheric waves that traveled around the globe and a tsunami that swept across the Pacific Ocean. An estimated 75% of Earth’s volcanoes are underwater, and 20% of all fatalities caused by volcanic eruptions since 1600 CE have been associated with underwater volcanism (3).
China’s high demand for online food delivery resulted in an increase in the use of disposable, single-use cutlery. Disposable cutlery increases plastic pollution, and paper napkins and wooden chopsticks contribute to environmental degradation that endangers wildlife and marine species and compromises human health. Informed by the literature on “green nudges, ” which are prompts to promote environmentally friendly behaviors, He et al. collaborated with Alibaba to use its mobile food delivery platform, Eleme, in a longitudinal field study across China.
The prized materials could be transformative for research — but only if they have other essential qualities.
The wave of excitement caused by LK-99 — the purple crystal that was going to change the world — has now died down after studies showed it wasn’t a superconductor. But a question remains: would a true room-temperature superconductor be revolutionary?
Record-high ocean temperatures, combined with a confluence of extreme climate and weather patterns, are pushing the world into uncharted waters. Researchers must help communities to plan how best to reduce the risks.
Oceans are warming up, and dangerously so. Since April this year, the average global sea surface temperature has been unusually high and rising; by August, oceans in the Northern Hemisphere had reached record-high temperatures, even surpassing 38 °C in one area around Florida.
Human and environmental health are inextricably linked. Yet ocean ecosystem health is declining because of anthropogenic pollution, overexploitation, and the effects of global climate change. These problems affect billions of people dependent on oceans for their lives, livelihoods, and cultural practices. The importance of ocean health is recognized by scientists, managers, policy-makers, nongovernmental organizations, and stakeholders including fishers, recreationalists, and cultural practitioners. So why are the oceans still degrading?
When Chandrayaan-3 touched down, India pulled off a huge win for its own space programme and for international efforts to understand the Moon.
It’s hard to land on the Moon and keep your spacecraft intact. Just days ago, Russia’s Luna-25 mission crashed, dashing hopes for the country’s first trip to the Moon since 1976, when it was part of the Soviet Union. In April, a private Japanese effort also crash-landed on the lunar surface. That is one of the reasons the successful landing of the Chandrayaan-3 mission by the Indian Space Research Organisation (ISRO) is so special.
Events in Hawaii show how much we have to learn about wildfire spread — but simple research steps can help to build resilience.
Driven by drought, high winds and extreme heat, fires in recent years have caused destruction and losses on a scale bigger than anyone is used to. The average annual global cost of wildfires is around US$50 billion, the World Economic Forum said in January. And by the end of the century, climate change might make catastrophic conflagrations 50% more common, according to the United Nations Environment Programme. Given the surge in urban development in and near forested areas, something has to be done to protect communities. As Maui’s experience shows, little is in place.
Scientists and philosophers are proposing a checklist based on theories of human consciousness
In 2021, Google engineer Blake Lemoine made headlines—and got himself fired—when he claimed that LaMDA, the chatbot he’d been testing, was sentient. Artificial intelligence (AI) systems, especially so-called large language models such as LaMDA and ChatGPT, can certainly seem conscious. But they’re trained on vast amounts of text to imitate human responses. So how can we really know?
In a rapidly urbanizing world, what happens in cities matters — and sustainability success stories show what can be achieved when researchers and policymakers work together.
More than half of the world’s population lives in cities, and that proportion is set to grow. By 2050, another two billion people will be urban dwellers, the United Nations estimates. Cities lie at the nexus of all aspects of human development, from building thriving economies to coping with climate change.
The planet has warmed 1.2 ºC on average, but that’s enough to produce big extremes.
From wilting saguaros in Arizona and hot-tub-like temperatures off the coast of Florida to increased heat-related hospitalizations in Europe and agricultural losses in China, last month felt unusually hot. It was: several teams have now confirmed that July 2023 was the hottest month in recorded history. And there’s more to come.
July is typically the hottest month of the year, and this July shattered records going back as far as 1850 by around 0.25 °C. Overall, the average global temperature was 1.54 °C above the preindustrial average for July, according to Berkeley Earth, a non-profit group in California that is one of several organizations tracking global warming. It’s a seemingly small increase, but what many people across the world actually experienced was a bout of long and often brutal heat waves.
Blazes and high winds blew projects apart and left a tight-knit research community shaken. What will it take to prevent future island fires?
In the wake of a series of powerful wildfires that ripped through Maui’s dry forests and the historic city of Lahaina this week killing more than 50 people, researchers on the island remain concerned about the personal fallout for fellow scientists and their families. Some are reeling from disruption to their projects: Studies of whales may be disrupted, for example, and a rare plant facility sustained damage. “We’re still wrapping our heads around what this really means, because right now, most of us are still in shock,” says marine mammal ecologist Marc Lammers. “And, of course, we’re thinking about our colleagues.”
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