Evidence for a cataclysm ~4.0-3.8 Gy ago

In the end, the zonecloses again, andplanetesimals arecaptured.JUPITER's TROJANSSolution :If the trojans' zone isopen, the preexistingtrojans canleave, but new onescan come. Thisregion would alwaysbe populated duringthe instability, byplanetesimalspassing by...When Jupiter and Saturnare very close to the 1:2resonance, the Trojanregion is fully unstable