Earth's mini moon could be a chunk of the big moon, scientists say

A mini moon that will bid farewell to Earth soon may in fact be a small hunk of the big moon — the one that has loomed far longer in the sky than humans have roamed the planet.A follow-up study has taken a closer look at the bus-sized space rock to better understand what it's made of, how fast it's spinning, and where it's traveling. A team of researchers says the mini moon is something in between an S-type asteroid, made of silicates and metal, and a V-type like Vesta, the second-largest