Pockets, matches, spectacles, postage stamps. Whether it's the stitches that hold our clothes together or the syringes that deliver life-saving vaccines, small things really do make a big difference.Yet these modest but essential components of everyday life are often overlooked. Science and comedy writer Helen Pilcher shares the unexpected stories of 50 humble innovations – from the accidental soldering of two bits of metal that created the pacemaker, to the eighteenth-century sea captain whose ingenious invention paved the way for the filming of Star Wars – and celebrates the joy of the small yet mighty.