Monday, September 21, 2026

Scientists have formally identified the tilcayo (Leopardus tilcayo), a small wild cat native to Bolivia's Yungas cloud forest, marking the first new wild cat species described in more than 100 years.^[1]

NASA's Nancy Grace Roman Space Telescope may have enough fuel for at least 22 years of science, more than double its original 10-year design life, following an extremely precise course correction after its August 30 launch.^[2]

A decade-long NIST experiment has produced a new measurement of the universal gravitational constant that differs unexpectedly from another leading result, deepening a 225-year-old physics puzzle about one of nature's most fundamental constants.^[3]

Caltech engineers have created a nanoscale silicon chip that can steer light in just 74 femtoseconds—74 quadrillionths of a second—a breakthrough that could enable dramatically faster photonic communications, computing, and sensing.^[4]

Researchers have created virtual 4D models of cancer cells using AI that closely replicate how real cells respond to drugs, a development that could reduce dependence on time-consuming lab experiments and accelerate drug discovery.^[5]

Ancient DNA analysis reveals that plague repeatedly returned to Europe for more than 400 years after the Black Death, evolving into new lineages and spreading through trade, migration, and war, with researchers developing a method to date ancient genomes more precisely.^[6]

Top economic officials from the U.S. and China began talks in New York City aimed at clearing the way for possible agreements on trade, artificial intelligence, and critical minerals ahead of a meeting between Presidents Trump and Xi later this week.^[7]

Germany's far-left Die Linke party was projected to win the most votes in the Berlin state election according to exit polls, though it would need coalition partners to form a government in the capital for the first time since reunification in 1990.^[8]

Polls closed in Russia's first wartime parliamentary elections, with the ruling United Russia party expected to win the tightly controlled vote that the Kremlin seeks to portray as popular support for its ongoing war in Ukraine.^[9]

Pope Leo XIV is preparing for his first official visit to France from September 25-28, where he will meet with abuse victims, visit the reopened Notre-Dame Cathedral, and address issues including the country's new assisted dying law.^[10]