March 2, 2019

Why do microwaves make my food hot?

Introduced in the late 1960s as a faster way to fix supper, microwave ovens use a special frequency of radio waves – called microwaves – that […]
March 2, 2019

How do air conditioners make my house cold?

The same way your refrigerator chills your soda. Both your fridge and your house’s A/C absorb heat into coils filled with special refrigerant chemicals. The coils […]
March 2, 2019

How big is the World Wide Web?

According to Google, the World Wide Web is made of more than 60 trillion individual pages – more pages than the number of neurons in your […]
March 2, 2019

Now she needs me, now she doesn’t. What’s going on?

Parents are puzzled when their toddler shifts from being dependent to being independent and back again. Why, for example, would she suddenly dart away from her […]