Children Are Naturally Skeptical of Santa Claus

First, researchers asked children between the ages of 3 and 9 about the possibility of various extraordinary events, some possible and some impossible. None of the events were related to Santa or to Christmas. (Shtulman used his own 4-year-old son as a “data point” in the study.) Next, the researchers asked children to help write a letter to Santa. Although children were free to include whatever they wanted, they were specifically encouraged to ask Santa some questions. “What we found...

 The Empty Space in an Atom

A favourite analogy portrays the nucleus as a fly in the middle of a sports stadium. The nearest neighbouring nucleus is another fly, in the middle of an adjacent stadium. The electrons of each atom are buzzing about in orbit around their respective flies, smaller than the tiniest gnats, too small to be seen on the same scale as the flies. When we look at a solid lump of iron or rock, we are 'really' looking at what is almost entirely empty space. It looks and feels solid and opaque because o...