Science Focus
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Humans physically fight over mates, sure (see Popeye vs Bluto). Other animals also get into confrontation over mates (bears, for example). But plants? Psssh. No way, right? How do you fight when you're basically immobile and blind to your competitors?
Even though plant reproduction doesn't resemble more familiar mating rituals, plants are still sexually competitive and try to exploit pollinators like birds and insects to one up each other. Now scientists in Argentina have found what appears to be the first evidence of a plant evolving weaponry to physically fight off its competitors.
Milkweeds...
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