

The oldest fossils known are stromatolite fossils from 3.48 billion years ago. There are living stromatolites today. They predate Earth having significant oxygen in its atmosphere, because the cyanobacteria that formed them created the oxygen gas through photosynthesis from carbon dioxide. They’ve orbited the galaxy over fifteen times.











I generally dislike self-censorship & other compliance in advance with authoritarianism, but people calling pædophiles “PDF files” is great as an insult to the format. Donald Trump is a PDF file, and I mean that as an insult to PDF files!