A New Way to Find the Tree of Life's Missing Branches

Scientists have been been studying the DNA of microbes for a quarter-century, and in that time, they have sequenced about 2 million microbes. By one estimate, as many as 1 trillion microbial species may live on Earth.

Progress? 0.0002 percent.

Only a tiny fraction of the tree of life has been filled in. In fact, whole branches are likely still yet to be discovered: branches of microbes living in remote environments like hydrothermal vents, branches of microbes that might be the link...

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