A Multitalented Scientist Seeks the Origins of Multicellularity

In Cassandra Extavour’s office at Harvard University hangs a placard with a painted rainbow flag and a friendly invitation. “You are welcome here,” it reads. “I have it up because I think it’s important to let people see your identities, especially when those identities are not well represented,” explained Extavour, an evolutionary geneticist who in 2014 became the first Black woman to win tenure...


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