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James Webb telescope discovers rare ring galaxy and 'intruder' 2 billion years after the Big Bang
Video Shows a San Diego Dog Seeming to Greet an Intruder. Why Didn’t He Bark?
The Intruder That Knocked Our Planets Askew
'Intruder' stars have changed Earth's climate over the eons. Here's how.
An 'extragalactic' intruder may lurk among stars orbiting the Milky Way's black hole