This demo is quite simple: It has one large button, the width of which is decreased when clicked, and a small one which has an increasing width.

He also found that even other food researchers ate more than half as much ice cream if they served themselves with big bowls and big scoops versus smaller bowls and scoops.

When Lu Hao was born he weighed just 2.6 kilograms, however, from the time he was three months old he began to gain weight rapidly.