Space is as vast as it is mysterious, so perhaps it’s not surprising that we’ve overlooked alien star system debris floating around in our planet’s orbit, but what about a "quasi-moon" that has been circling Earth since 100 B.C.? How did that slip through the net? Perhaps we were too busy looking for aliens saying hello.
Back on terra firma, archaeologists in South Africa found 153,000-year-old footprints that are the oldest Homo sapiens tracks on record — a discovery that left the team who found them "pleasantly astonished." Another pleasantly astonishing find was the collection of 2,700-year-old petroglyphs depicting people, ships and animals discovered in Sweden.
