TeamViewer 4.0.5769 is a tool that you install on your computer, Windows or Mac, and then use to access, control and manage a host PC or Mac. The host doesn't need any software installed, either and can end the session at any time. However, with fast broadband (or even fast 3G), you could easily access their machine across the Internet, even if they are located in another country. Yes, you could charge for this service, too. CrossLoop is another example of similar technology.
Some parts of Atacama have not received rainfall for 500 years - but a sudden deluge of water upset the Desert's delicate biological balance
Spitzer Space Telescope could not spot Oumuamua, suggesting that it is actually pretty small
Greenland crater one of the 25 largest impact craters on Earth
This long-sought progenitor star was identified in an image captured by Hubble in 2007