“Impossible, impossible,” were the two words Emily Ruth Giske suddenly sang to Jennifer Pollack Percival over the phone in February 2022.

“Any research into the mechanisms of how this animal is able to live for such a long time will at some point need the genome sequence,” said Steve Hoffmann, a computational biologist at the Leibniz Institute on Aging and the Friedrich Schiller University Jena, in Germany, who led the research.

“I was so happy I broke into song,” said Ms. Giske, who was ecstatic when Dr. Percival then joined in with the rest of the lyrics to that Rodgers and Hammerstein song “Impossible / It’s Possible” from “Cinderella.” (Dr. Percival soon learned Ms. Giske had a hearty repertoire of show tunes, ’70s hits and made-up songs.)

The two had met five weeks earlier on Match.com after Ms. Giske, 64, switched her app’s location from New York, where she lived, to Aventura,66jogo Cassinos Online Brasil Fla., while on vacation with her now 7-year-old child.

“Emily popped up,” said Dr. Percival, 45, who lives in Boca Raton, after she specifically did a search for a woman with a master’s degree who was also Jewish.

Until then, although each dated casually, they had pretty much given up on long-term love — Dr. Percival’s previous two marriages ended in divorce, as did Ms. Giske’s previous one.

“We’ve been very successful in life and less successful in love,” said Dr. Percival, who, like Ms. Giske, focused on being the “best mom” she could be and a career “to make the world a better place.”

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