Often in PHP you want the same block of code to run over and over again and instead of adding several almost equal lines, you can use loops to perform this task much easier.
Once in a lifetime opportunity to catch the comet Panstarrs with your naked eye as it passes the Sun. It should shine in its fullest on March 10, read on if you don't want to miss it.
Mars is the most explored and well know planet so far, so you shouldn't have to much trouble knowing some of its facts. Go through this short quiz and build up you Dreevoo knowledge profile.