Why do we remember the past, but not the future?

If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza, let alone cooking it.

There is a real danger that computers will develop intelligence and take over.

Is god omnipotent ? If he is, can he create a rock so heavy he can't lift it ?

Everyone can enjoy a life of luxurious leisure if the machine-produced wealth is shared, or most people can end up miserably poor if the machine-owners successfully lobby against wealth redistribution.