Scientists watched a once-in-a-lifetime evolutionary event happen that they say has only ever happened two other times in known history.
Scientists have watched two lifeforms merge in a once-in-a-lifetime evolutionary event. The event is so rare that scientists say it has only ever happened twice that we know of, and each time led to a massive evolutionary breakthrough. The first of these breakthroughs happened roughly 2.2 billion years ago, researchers say. That event led to the evolution of mitochondria, which eventually helped allow for the formation of all complex forms of life. The second of these events happened around 1.
It isn’t very clear what kind of evolutionary breakthrough this change might constitute, but it does show that something is happening in this class of algae that we haven’t really seen before. The researchers also found that the size ratio between the algae and the bacterium, which is known as UCYN-A, is similar across multiple related species of algae.
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