Egg-Cracking Study Upends Conventional Wisdom

Those dropped on their sides cracked less often than those dropped on their ends
By Newser Editors and Wire Services
Posted May 9, 2025 4:45 PM CDT
Eggs Less Likely to Crack When Dropped on Their Side
A hen stands on eggs inside her coop at a farm in Glenview, Ill.   (AP Photo/Erin Hooley, File)

Eggs are less likely to crack when they fall on their side, according to experiments with over 200 eggs. What does this mean for the best way to crack an egg for breakfast? Not much, since a break around the middle is the best way to get the golden yolk and runny whites to ooze out, per the AP. But scientists said it could help with hard-boiling eggs in a pot: Dropping eggs in horizontally may be less likely to cause a stray crack that can unleash the egg's insides in a puffy, cloudy mess.

It's commonly thought that eggs are strongest at their ends—after all, it's how they're packaged in the carton. The thinking is that the arc-shaped bottom of an egg redirects the force and softens the blow of impact. But when scientists squeezed eggs in both directions during a compression test, they cracked under the same amount of force. "The fun started when we thought we would get one result and then we saw another," said Hudson Borja da Rocha of the Massachusetts Institute of Technology, who helped run the experiments.

The researchers also ran simulations and dropped eggs horizontally and vertically from three short heights up to 0.4 inches. The result? The ones dropped horizontally cracked less. "The common sense is that the egg in the vertical direction is stronger than if you lay the egg down," said materials scientist Marc Meyers with the University of California, San Diego, who was not involved with the new study. "But they proved that's not the case."

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Scientists found that the egg's equator was more flexible and absorbed more of the energy of the fall before cracking. The findings were published Thursday in the journal Communications Physics. Eggs are also usually nestled top-down into homemade contraptions for egg drop challenges as part of school STEM projects, which partially inspired the new study. It's not yet clear whether the new results will help protect these vulnerable eggs, which are dropped at much loftier heights. (More discoveries stories.)

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