X-ray scans explain how the ‘Brazil nut effect’ works
Videos reveal larger particles flip vertically, letting smaller ones fall below
![mixed nuts](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/04/042021_MT_brazil-nut_feat.jpg?fit=1030%2C580&ssl=1)
A new experiment helps explain why large Brazil nuts tend to gather at the top of mixed nut packages.
Boblin/E+/Getty Images Plus