[OAB 53] It is claimed that the Poynting-Robertson effect (see Influx of Small Particles to the Sun, above) should have had sufficient time to sort meteoroids by size, if the Solar System were old. But of course, meteoroids (which are interplanetary particles that can fall into Earth's atmosphere and become meteors) are being constantly replenished by comets (see Maximum Life of Meteor Showers, above), thus maintaining a random distribution.