Visitors from the Abyss: How Passing Planets Shaped Earth's Fate ⚡ экспресс
Observational data point to a likely abundance of planetary-mass objects lurking in the outer solar system. Gravitational nudges can occasionally send them inward. While the classic Moon-forming scenario involves a Mars-sized impactor hitting early Earth, glancing blows or near-miss flybys are actually more probable. These events unleash intense tidal forces: mega-tsunamis, volcanic paroxysms, retreating seas, synchronized meteor showers, and rapid climate swings. When matched with the geological record, such cataclysms can account for several of the big mass extinctions over the past 600 million years. These episodes likely repeat throughout Earth's deeper history, too. And as smaller planets were swallowed by larger ones and by the Sun over 4 billion years, that could have added extra temperature shakes to the rocky worlds.
On the outskirts of the Solar System, thousands of objects the size of a planet lurk. Sometimes their paths cross Earth's orbit. A collision isn't necessary—even a close flyby of such a behemoth can trigger a catastrophe.
Such events left traces in the rocks: layers of ash and washed-away animals across the globe. The demise of the dinosaurs 66 million years ago might have been caused not only by an asteroid but also by a passing planet. And the Sun itself, over its long life, has snagged such wanderers, briefly intensifying its heat—Earth alternately froze and roasted.
🎯 Tidal forces knead Io, Jupiter's moon, so relentlessly that it erupts lava nonstop—like a cosmic poker stoking the coals.
🎬 In Stephen Baxter's novel "Evolution", a passing neutron star alters Earth's climate and triggers an extinction.