Android: Swipe down from the top of your screen -- to access the Quick Settings panel -- and then tap the Airplane mode icon.

If you hit a hurdle in Microsoft Excel, press F1 to bring up the Help pane, usually to the right of the window.

Finally, the Earth moves a little bit beyond one complete revolution, so the stick again points towards the sun for a second local noon. The sidereal day is just a little bit shorter—approximately 23 ...

Have you heard of Power Query in Microsoft Excel but always thought that it's only intended for Excel experts? Let me stop ...