Lab notes: So long Indiana Jones? Archaeology goes high-tech

Jaws have dropped as new laser scanning techniques revealed an ancient Mexican city that archaeologists say may have had as many buildings as Manhattan. Groundbreaking lidar scanning is showing the true scale of Angamuco, which was built by the Puri(C)pecha from about 900AD. From that sublime news to the utterly ridiculous: experts are having to voice their concern about the rise of DIY faecal transplants. It seems people need to be warned that, although some really promising science suggests links between gut microbes and a host of health problems, jumping ahead of scientists and following a Youtube video to do it at home is a really daft idea. Step away from your laptops, people, or accept the consequences and a Darwin award. Worrying in a different way is the news that compounds called perfluoroalkyl substances - found in non-stick pans, packaging and some carpets - may contribute to obesity. They have already been potentially linked to cancer, high cholesterol and immune problems. This will cheer you up though: ants are officially incredible. Researchers have observed "paramedic ants" treating their injured comrades, cleaning wounds and possibly even administering antibiotics to prevent infection. Make sure you watch the video, it's pretty cool. And speaking of cool (well, he's cold), one of our reporters, Matthew Taylor, is currently aboard the Arctic Sunrise on a Greenpeace expedition in the Antarctic- do you have any questions you'd like him to ask the scientists and experts on board? Let us know what they are.