When you want to copy the result of the cell to another cell in Excel, the target displays an invalid references error messag. This error can be avoided by copying cell value into target cell and not the whole formulas.
From today on, Google's RSS reading service the Google Reader will retire for good. We already published the alternatives, but here they again in case you missed or didn't yet bother looking for the substitute.
A Black hole is a place in space where gravity pulls so much that even light can not get out. They are one of the greatest mysteries in space. Take this quiz adn find out how much do you really know about Black holes!
