By 2050, the UN expects that there will be almost 10 billion people on the Earth. This poses some serious practical questions, not least among which is how we'll put food into 2.5 billion or so extra tummies (especially given that we don't adequately fill all of the 7-plus billion we already have). If you're yet to hear alarming phrases like "food security" and "sustainable intensification" you've probably been living under a rock. Which is apt, actually, because that's exactly where you might find one of the proposed answers: insects. A pop-up kitchen in London on Thursday served up a variety of bug-based bites to passers by, and Gizmag arrived soon after it opened to sample the wares on offer.