• The story on the use of pig whipworms to treat inflammatory bowel disease (10 April, p 8) said that a German company called BioCure might launch a worm-egg drink as soon as May. In fact, the company is still trying to create a product that can be stored. Until this problem is solved, doctors would have to prepare fresh batches of eggs for patients.
• In Last week’s Cutting Edge, page 24, we said that phycoerthrins are naturally red in visible light and glow luminous pink in UV, while phycocyanins are blue in visible light, and glow yellow in UV. This is wrong. In UV light phycoerythrins glow yellow and phycocyanins glow red.
