A man sits with a pretty girl for an hour and it seems shorter than a minute. But tell that same man to sit on a hot stove for a minute, it is longer than any hour. That's relativity.
In the beginning there was nothing, which exploded.
Learn from yesterday, live for today, hope for tomorrow. The important thing is to not stop questioning.
Now he has departed from this strange world a little ahead of me. That means nothing. People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.
There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.
Momentum, a function of mass and velocity, is conserved between portals. In layman's terms, speedy thing goes in, speedy thing comes out.