Who was Robespierre?

Maximilien Robespierre was an important leader during the French Revolution. He was part of the Commune of Paris that overthrew Louis XVI. Under his orders, protesters were paraded and guillotined in public. On 28 July 1794, Robespierre himself was guillotined without A trial.

Which mammals fly?

There is only one mammal that flies: the bat. Most bats are nocturnal, which means they sleep during the day and are most active at dawn, dusk, or nighttime. During the day, they sleep by hanging upside down in groups called roots. Most bats, called microbats, eat flying insects, such as moths and flies, but others eat small mammals, like mice. Some insect-eating bats can land on the ground and chase insects that live in leaf litter or dirt. One of these bats, the pallid bat, feeds on scorpions and large centipedes. Others eat fish or live on cow’s blood. The largest bats are megabats, which feed mostly on fruit.

What do A.M. and P.M. stand for?

The initials A.M. stand for ante meridian, which is Latin for "before noon." The initials P.M. stand for post meridian, which is Latin for "after noon."

How do you get static out of hair?

If you put a conditioner on your hair, it will attract enough moisture to allow static charge to dissipate.

Why do we say “Goodnight sleep tight”?

Sometime during the sixteenth century, British farmers moved from sleeping on the ground to sleeping in beds. These beds were little more than straw-filled mattress tied to wooden frames with ropes. To secure the mattress before sleeping, you pulled on the ropes to tighten them, and that’s when they began saying, “Goodnight, sleep tight.”

What happens to the current when it "stops"?

Current refers to moving charged particles. In most solids, the particles that do the moving are negatively charged electrons that move in the opposite direction from the way we say that current is flowing. These charged particles are the components of atoms and molecules, so they are always there inside a wire or the filament of a light bulb, even if they are not moving. Thus when the current "stops", these electrically charged particles simply stop moving. You can imagine a pipe full of water. The water can be flowing to the right or left (a current) or it can be standing still (no current). The water itself, like the charged particles, doesn't disappear when the flow stops.

I have read articles about research into anti-gravity. Do you think it is really possible?

No, I don't think that anti-gravity is possible. The interpretation of gravity found in Einstein's General Theory of Relativity is as a curvature of space-time around a concentration of mass/energy. That curvature has a specific sign, leading to what can be viewed as an attractive force. There is no mechanism for reversing the sign of the curvature and creating a repulsive force—anti-gravity. I know of only one case, involving a collision between two rapidly spinning black holes, in which two objects repel one another through gravitational effects. But that bizarre case is hardly the anti-gravity that people would hope to find.