Physics.

I'm now studying physics, and I'm learning everything, from flower pots to sky diving rescues. Here are the main things:

• To become a skydiving expert, you need physics, because when someone was unconscious jumping out of a plane, her fellow skydiver rushed in, and sped up and slowed his fall with physics so he could activate his partners parachute, then continued skydiving.
• A hammer and a feather will not hit earth at the exact same time, air resistance won't allow it, but on the moon they hit at the ground at the same time, for there isn't as much air resistance there.
• If you throw a pencil and a flowerpot out the window, they hit on the same time with the same speed, but the flower pot has more energy, while the pencil doesn't have to much.

I'm sure there are plenty more, but that the main of what i have learned. Stay Tuned.