Mac OS X Moutain Lion and its Safari web browser sharing options allow you to share and send any web page vie email as a PDF attachment in a matter of two clicks.
I bet at some point you were wondering how much gold is there in the world. I know I have. See these mind-blowing 3D visualizations of gold compared to everyday objects to get a better perception.
You will probably have a hard time believing this cardboard T-Rex isn't moving its head while it appears it's constantly tracking and looking back at you.
Some installations or settings changes require you to restart your computer. In most cases you don't need to actually reboot it, you only need to restart the explorer.exe process.