Harvard University researchers have made thin polymer sheets that can crawl, grip and wriggle. They patterned the surface of the polymer with a protein called fibronectin. Rat muscle cells then automatically attached themselves to the polymer via the protein and formed muscle tissue that moved when given a jolt of electricity (). The material could be used to test drugs or repair organs.
Forget passwords, try “passgrids”. says its system is simpler and safer. Instead of remembering a PIN or password, users memorise a sequence of cell positions on a grid. A prompter grid appears on the screen with a random number in each cell. The user then types in the numbers occupying “their” cells. The numbers change with each entry, so watching which keys are hit won’t give away the passgrid.
