The term “bar fight” does not actually appear in Saila Varis’ recent paper in the journal Trees or in her Ph.D. dissertation on the Scots pine. But she’s a good sport about discussing whether her research suggests that tree pollen grains have their own versions of nose-punching brawls over female favor. After all, pollen grains from genetically different trees of the same species appear to be able to sabotage each other’s race to a mate, says Varis, of the Finnish Forest Research Institute near Helsinki. Though it is not exactly like a bar fight, she says, there are hints of male-versus-male competition
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