Back in March I blogged about new research which called into question whether life has existed on this planet for 3.5 billion years. A fossil believed to be a bacteria is now thought to be a hermatite (a mineral), making the oldest life form 2 billion years old. Now a 3.4 billion year old extremophile fossil has been discovered inAustralia. The organism is thought to have been sulfur-based rather than oxygen-based.
Such is the nature of science. Life gets a 1.5 billion year age reduction in a single day, and then a few months later, it ages quickly to just 100 million years short of its original mark.
HT: Uncommon Descent