Scientists have reportedly found a way to create a DVD-sized disc that can hold 1,000 terabytes of data – enough to store 40,000 HD movies. It’s all to do with using lasers in a way akin to a fine tipped pen rather than a felt-tip pen – the old way – to write information to the disc, apparently. Two lasers have been used to massively increase the storage capacity of a DVD from 4.7 gigabytes. One beam partially blocks the light…