What appeared on earth first? neanderthals, homo habilis, homo sapiens, australopithecines

The earliest evidence for life found so far is in a 3.8 billion-year-old rock, the Isua sediments, found in western Greenland. The evidence for life in these rocks does not come from fossilized remains, but from a peculiar chemical signature of living organisms. These rocks were deposited on the surface of an oceanic crust on what was thought to be a deep ocean. So the Isua sediments are actually an ancient sea-floor.

✔ Australopithecines ** is the correct answer

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aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on