Turns out the trick to keeping cake fresh down to the last morsel is extremely simple.

First developed a century ago, the easy method to preserve a round cake's freshness is to cut it down the middle, removing the right amount, and then clap the two halves back together with a rubber band, ABC News reported.

Francis Galton, the Victorian scientist who discovered the cake slicing method, also first documented human fingerprints and drew the first weather map.

"[Galton] was the king of measurement, and he was very English. He loved tea and cake," said author Alex Bellos, as quoted by ABC News. "He's not a household name, but so many of the things he invented are things we take for granted in the modern world. In his old age he sent [scientific journal] 'Nature' this letter about the best way to cut a cake, and when I saw that, I thought, 'That is absolutely wonderful.'"

The rubber band holds the cake together, preventing air from reaching the interior and keeping moisture inside. According to Bellos, the principle can help keep bread and pastries fresh as well.

"We instinctively see the circle as a wheel, which is a point going around another fixed point, but if we stop and try to see it in a completely different way, then that's when you come up with this other solution," Bellos said. "It's also charming that it's something so simple invented by someone who was so important scientifically."

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