One of the favourite types of out-of-place artefact is unusually early technology, from electric batteries in ancient Iraq to images of helicopters and jet fighters on Egyptian temples. It has to be said that most of the ‘evidence’ presented is extraordinarily weak: rather than the artefacts themselves, crafted with a degree of technical sophistication that ought to rival or outstrip our own, we are instead invited to consider images. Some of these images are tiny, consisting of scratches on a Mesopotamian cylinder seal, while others only depict what they are claimed to show if we use our imaginations, like the images of ‘electric light bulbs’ found in Egyptian art. None of this evidence really stands up to even the slightest scrutiny.