Invisible Cosmic Explosions Ravaged Earth
What if significant explosions from outer space have influenced the history of Earth without leaving visible craters? Recent research published on December 19, 2025, indicates that "touchdown airbursts" – explosions from comets or asteroids occurring above the surface – could be much more frequent and damaging than previously believed. Led by James Kennett from UC Santa Barbara, four studies featured in PLOS One and Airbursts and Cratering Impacts provide evidence from ancient locations, implying that these "invisible" occurrences have instigated climate changes, extinctions of megafauna, and even disasters affecting humans. Let us delve into this neglected hazard and understand why it requires greater scrutiny.