GEOLOGY

Detailed explanation-1: -Lucy, a 3.2 million year old Australopithecus afarensis named after the Beatles’ song “Lucy in the Sky with Diamonds", is perhaps the most famous fossil in the world.

Detailed explanation-2: -Over time, minerals in the sediment seep into the remains. The remains become fossilized. Fossilization usually occur in organisms with hard, bony body parts, such as skeletons, teeth, or shells. Soft-bodied organisms, such as worms, are rarely fossilized.

Detailed explanation-3: -The earliest fossils resemble microorganisms such as bacteria and cyanobacteria (blue-green algae); the oldest of these fossils appear in rocks 3.5 billion years old (see Precambrian time).

Detailed explanation-4: -Fossils: Fossils are preserved parts of dead organisms. This is the impression of once-living organisms on the earth. Examples of fossils are animal bones, shells, stone imprints, cast molds, etc. Paleontology is the study of fossils.