Large organisms whose fossils can reasonably be interpreted as animals did not evolve until late in the Ediacaran period, more than four billion years after the Earth formed. It’s sometimes claimed that these represented the first “complex life” but there’s really nothing simple about bacteria, archaea, algae or fungi, which were already well established and hugely … Continue reading New collaboration: an Ediacaran mass extinction?
Astrobiologists aim to work out how life fits into the wider universe, uniting biology with the planetary and space sciences to draw a unified picture of the cosmos and our place in it. This ambition is, of course, far older than the discipline itself. A 1748 engraving of an astronomy lecture. [Source] The atomist philosopher … Continue reading Astrobiology before “astrobiologists”: a potted history
This blog post discusses a new article that my colleagues and I recently published in the journal, Astrobiology. Those with access to this journal can find the article here. Microscopic iron pyrite crystals preserved in an ancient gypsum vein — a new target in the search for life on Mars? Life on Earth is not limited … Continue reading New paper: could we find life’s fingerprints in mineral veins on Mars?