The Przewalski's horse was declared extinct in the wild during the 1970s and has been reintroduced through a conservation program launched in 1985. Przewalski's horse is the world's only surviving wild horse species and has an evolutionary history of 60 million years.
San Diego is negotiating with Arizona and Nevada to sell water from North America's largest desalination plant. The agreement could supply roughly 500,000 people with drinking water annually. San Diego has reduced its water imports from 95 percent to 10 percent over three decades.
Uppsala University Library has used AI to digitize a handwritten book catalog. The work corresponds to more than ten years of manual labor and has been completed in a much shorter time. The material is now easier to find and use for researchers and the general public.
Solar and wind accounted for 99% of the growth in global electricity demand during 2025. Solar energy grew by 636 TWh β more electricity than all LNG exports through the Strait of Hormuz can produce. For the first time, coal power accounts for less than a third of the world's electricity generation.
Nearly three quarters of the world's countries received higher or unchanged scores in the 2025 democracy index. Latin America and the Caribbean broke a nine-year decline and improved their results. The global index rose by 0.02 points, one of the largest increases since 2012.
Project Obsidian will be the world's first geothermal power plant to extract energy from rock at 300 to 500 degrees Celsius. The millimeter wave drilling technique allows drilling to reach depths and temperatures that conventional drills cannot handle.
A study from Ecuador shows that biodiversity in tropical rainforest recovers to more than 90 percent of its original level within three decades. Three-quarters of the animal and plant species typical of untouched primary forest return to abandoned agricultural land during the same period.
The Simon Abundance Index (SAI) measures the relationship between population and resource abundance. It rose from 100 in 1980 to 636.4 in 2025, an increase of 536.4 percent. While the world's population grew by 85 percent, personal resource abundance increased by 244 percent.
Researchers have now mapped every part of the flagellar motor that bacteria use to swim, after more than 50 years of research. The motor spins several hundred revolutions per second and is powered by protons streaming into the cell at more than 2,000 per second.