For a basic 500 square feet project in zip code 47474, the benchmark cost to Insulate Your Home ranges between $0.63 - $1.43 per square foot* . To estimate costs for your project: 1.
So in answer to your question, the oldest fossils are stromatolites, and the life forms that created those fossils were prokaryotic bacteria and algae like cyanobacteria.
Earliest life on Earth: scientists find evidence in WA rock sediments. Evidence of what could be the earliest forms of life on Earth has been unearthed in the remote Pilbara region of Western Australia. Researchers from Australia and the US have discovered signs of âcomplex microbial ecosystemsâ within rock sediments dated at 3.5bn years old.