Straightening Out Gut Bacteria - Naked Scientists NewsFLASH - 31.05.10

We explore the oily threat to Tuna and a newly discovered way that blood vessels in the brain clear a blockage in this Naked Scientists NewsFlash. Plus, how channels on Mars reveal secrets about the Martian climate, and the fossil evidence that shows the octopus is older than expected. We find out why shape is essential for H. plyori - a gut bug associated with ulcers and cancer.