Visitors from the Abyss: How Passing Planets Shaped Earth's Fate ⚡ экспресс
In the outer reaches of the solar system, there likely exists a multitude of planetary-mass objects. Gravitational tugs occasionally fling them into the inner regions, where they can pass dangerously close to Earth. Such close encounters—more frequent than direct collisions—trigger powerful tidal effects: giant tsunamis, volcanic outbursts, receding seas, and abrupt climate shifts. These catastrophes could be behind several mass extinctions over the past 600 million years. Interestingly, such events leave 'chemical signatures' in the form of a global layer of meteoritic dust.
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.