New species evolve whenever a lineage splits off into several. Because of this, the kinship between species is often described in terms of a 'tree of life,' where every branch constitutes a species. Now, researchers have found that evolution is more complex than this model would have it, and that the tree is actually more akin to a bush.
New species evolve whenever a lineage splits off into several. Because of this, the kinship between species is often described in terms of a 'tree of life,' where every branch constitutes a species. Now, researchers have found that evolution is more complex than this model would have it, and that the tree is actually more akin to a bush.
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