• Cooling episode 7 200 years ago linked to 500-year hiatus in early Chinese culture

    ByReet Kaur

    A 7 200-year-old cold event, recorded on the Chinese Loess Plateau, triggered a 500-year hiatus in the Dadiwan Culture, according to a study published in Catena on September 19, 2025. Researchers link the event to reduced solar activity, disruptions in the Atlantic Meridional Overturning Circulation (AMOC), and weakened monsoons. While the strongest signal for the cooling episode is seen across the Northern Hemisphere, global drivers such as reduced solar irradiance suggest the Southern Hemisphere was likely affected as well, though evidence there is less clear.

  • Study finds Earth’s crustal evolution ties to Milky Way galactic cycles

    ByReet Kaur

    Zircon isotopes from Earth’s crust show repeating patterns that align with the Solar System’s movement through the Milky Way’s spiral arms, according to research published in Physical Review Research on September 19, 2025. The findings suggest that comet impacts triggered during spiral-arm crossings may have influenced magmatic processes and continental growth.

  • Impact of prolonged power outage on excess deaths in Puerto Rico after Hurricane Maria

    ByReet Kaur

    Hurricane Maria made landfall near Yabucoa, Puerto Rico, at 10:15 UTC (06:15 LT) on September 20, 2017, leaving 2 975 excess deaths and causing the longest blackout in U.S. history. The storm showed how fragile infrastructure can turn a natural hazard into a mass-casualty disaster. With the grid collapsed for months, hospitals faltered, medicines spoiled, and thousands died not from winds or floods but from the blackout’s cascading effects.

  • 1985 M8.0 Mexico City earthquake and the birth of earthquake early warning

    ByReet Kaur

    When an M8.0 earthquake struck Mexico City at 13:17 UTC (07:17 LT) on September 19, 1985, shaking lasted nearly four minutes and toppled more than 400 buildings, killing over 10 000 people. The disaster revealed how resonant lakebed soils could amplify distant seismic waves into catastrophic motion, a finding that reshaped earthquake science and led to the world’s first public early warning system.

  • Sudden blast of asteroid 2023 CX1 over France reveals new impact risk

    ByReet Kaur

    Asteroid 2023 CX1 fragmented abruptly instead of breaking apart gradually. At a dynamic pressure of 4 MPa, it disintegrated almost instantly, releasing 98% of its total energy in a concentrated region at 28 km (17 miles) altitude. This sudden failure produced a spherical shock wave, unlike the usual cylindrical energy distribution of most fireballs. Calculations…

  • What the Toba super-eruption 74 000 years ago reveals about human survival

    ByReet Kaur

    The Toba super-eruption in present-day Indonesia about 74 000 years ago ejected 2 800 km3 (672 mi3) of ash and formed a 100 x 30 km (62 x 18 miles) wide caldera. Once thought to have nearly wiped out our species, evidence now shows that resilience and adaptability, not collapse, defined humanity’s survival.