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This makes them striking examples of convergent evolution, where two evolutionarily distinct groups evolve similar characteristics due to similar environments and occupying similar niches.

McInerney was lead author on a study on convergent evolution in bacteria that helps us understand how this background might work, and to distinguish these two ways convergence may occur.

Dolphins and bats both utilizing echolocation or birds and bugs both having wings are other examples of convergent evolution.

"Our research highlights a fascinating example of convergent evolution, where ferns and flowering plants independently developed similar strategies to defend themselves against predation by recruiting ant defenders with nectaries," said Suissa.

“The U.S., Japan, and the Philippines are three closely aligned maritime democracies with increasingly convergent strategic objectives and interests,” Jake Sullivan, the president’s national security adviser, said on Tuesday.