Scientists have uncovered the fossil of a 52-million-year old beetle that likely was able to live alongside ants — preying on their eggs and usurping resources — within the comfort of their nest. The fossil, encased in a piece of amber from India, is the oldest-known example of this kind of social parasitism, known as ‘myrmecophily.’ The research also shows that the diversification of these stealth beetles, which infiltrate ant nests world-wide today, correlates with the ecological rise of modern ants.