The First Sex

Origin of mating
1.2 billion years ago?

Between 1.8 billion and 800 million years ago, the fossil record looks fairly dull – so much so that the period is called the ‘Boring Billion’. But behind the scenes plenty was happening. For one thing sex may have evolved for the first time. It’s not clear why, or when, some organisms stopped simply dividing in two and started the messy business of sex. But it was definitely going on 1.2 billion years ago: there are fossils of red algae from that time that were clearly forming specialised sex cells such as spores.

See other: History of Life

8 thoughts on “The First Sex

  1. Ark – he WILL sulk all weekend! It’s what he does best.
    (Ark’s an old friend, and I mean an OLD friend —)

  2. I thought you meant the adverb, as in ‘as well’, not the affirmation, as in ‘am too’; which, if I’m not mistaken, is an Americanism.

    But let’s move on from sulking, particularly since it came about because of me not uploading my legs onto the interweb.

  3. Fine with me, but knowing him, he’ll fantasize that they are anyway.

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