Science of sandcastles is clarified, finally

Capillary condensation is a textbook phenomenon and omnipresent in our world. For example, children playing on the beach rely on this universal process to hold their sandcastles together. Despite its importance scientists have had to rely on an equation first set by the great Victorian physicist Lord Kelvin 150 years ago – but for the first time a team led by Nobel laureate Andre Geim can explain how the microscopic process actually works.
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