If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...

A new imaging method that can reveal objects concealed behind opaque materials like sand, fog and human tissue for instance, has been developed by researchers at the Institut Langevin in Paris and TU ...