Cosmic dust grains found on city rooftops for the first time
Micrometeorites (MMs)
Misleading “first time” heading. Relatively old news. Iron micrometeorites (& stony MMs) falling to earth globally have been known about for many years. With a magnet I filtered out a good selection years ago in my backyard in London. I have a small section in my Extraterrestrial Sands book on how to do this. See also here.
The question is: Do micrometeorites originate from the birth of the solar system as per consensus or are they the result of more recent planetary upheaval? I contend MMs (along with unfathomable quantities of dust and debris) derive from the birth of the Mars’ iron core to become the planet Mercury. A monumental event (incomprehensible to most) that occurred during historical times!
See: The Birth of Mercury and the Demise of Mars
