Tuesday, April 21, 2026

The Dark Energy Spectroscopic Instrument (DESI) has completed the largest high-resolution 3D map of the universe ever created, mapping more than 47 million galaxies and quasars—far exceeding its original goal of 34 million. Early results suggest dark energy may be evolving over time rather than remaining constant, which could reshape our understanding of the universe's fate.^[1]

A humanoid robot named Lightning completed a half-marathon in Beijing in 50 minutes and 26 seconds, beating the human world record by nearly seven minutes. The robot, developed by Chinese smartphone maker Honor, demonstrated significant advances from last year's race where the winning robot took over two and a half hours.^[2]

A magnitude 7.7 earthquake struck off Japan's northeastern coast on Monday, triggering tsunami warnings and evacuation orders for nearly 176,000 people. Tsunami waves up to 80 centimeters were observed, but no injuries or significant damage were reported as the warning was later downgraded to an advisory.^[3]

NASA's Parker Solar Probe has uncovered new details about how magnetic reconnection events on the Sun accelerate particles to dangerous speeds. During a 2022 solar flyby, the probe passed between the Sun and a magnetic reconnection event in the solar wind, capturing direct measurements of the process that triggers solar storms.^[4]

Scientists at the University of Illinois have developed a new technique using RNA barcodes to map neuronal connectivity at single-synapse resolution. The method, called Connectome-seq, enables high-throughput mapping of the brain's hidden wiring, potentially advancing understanding of how neural circuits function.^[5]

U.S.-Iran peace talks remain in doubt as Iran declined to send negotiators to Pakistan for a second round, citing the ongoing U.S. naval blockade of Iranian ports as a breach of the ceasefire. The current two-week ceasefire is set to expire on April 22, with both sides at an impasse over nuclear issues and control of the Strait of Hormuz.^[6]

Japan's Meteorological Agency issued a rare advisory warning of slightly elevated risk of a potential magnitude 8.0 or greater earthquake following Monday's magnitude 7.7 quake. Officials said the chance of a mega-quake is about 1%, compared to 0.1% during normal times, and the advisory will remain in place until April 27.^[7]

An international collaboration of astronomers has developed a new framework that combines multiple techniques for measuring cosmic distances to produce a more precise measurement of the universe's expansion rate, known as the Hubble constant. The analysis incorporates data from NASA's Hubble and James Webb space telescopes.^[8]

The 2026 Cannes Film Festival lineup includes major directors Pedro Almodóvar, Steven Soderbergh, and Ron Howard, along with Iranian filmmaker Asghar Farhadi among the 21 directors competing for the Palme d'Or. Stars including Javier Bardem, Michael Fassbender, and Kristen Stewart will also appear on the Croisette.^[9]

NASA's Northrop Grumman CRS-24 cargo mission successfully launched to deliver science experiments, technology demonstrations, and crew supplies to the International Space Station. The Cygnus spacecraft is carrying research materials that will support ongoing scientific work aboard the orbital laboratory.^[10]