Revenge of the microbes: how bacteria have re-emerged as a threat to our existence

Bacteria are our ancient enemies, evolving ever more clever ways of outmanoeuvring our natural defences and scientific technologies. For millennia, a simple cut or cough could kill. With the development of antibiotics, it seemed we would reign supreme. But now the bacteria are again gaining ground. With antibiotic resistance on the rise, and the development of new drugs having stagnated for decades, we humans might be in a lot of trouble very soon. Why are bacteria so insidious, what tricks do they employ to get the upper hand, and what can we do to stop them?