Why are plane and boat propellers in different places?

Dave writes in wanting to know whether there is any way to get nuclear energy onto the grid without heating up water to turn a steam turbine. A great question that sees James Tytko dip his toe into the uranium heated waters of nuclear engineering... Like this podcast? Please help…

David wants to know, after looking at distant galaxies in the night sky, how long it took to create them. James Tytko took on the question with the help of the University of Cambridge's Public Astronomer, Matt Bothwell... Like this podcast? Please help us by supporting the Naked Scientists

Parasites have to come up with all sorts of tricks to evade the immune system of their hosts. But Kate wants to know, how do they know they've found the right place? James Tytko took her question on with help from Catherine Merrick, professor of parisitology at the University of…

Rick wants to know why the Canada geese he's been observing, who are preparing to migrate for the winter, are honking so incessantly while flying in formation. Viola Ross-Smith from the British Trust for Ornithology was on hand to help James Tytko with the answer... Like this podcast? Please help…

Van writes in with, 'A friend is encouraging me to take a cancer screening test that screens for many different cancers. A review of one test says: "While overall it picks up 90% of stage 4 cancers, it only detects an average of 17% of stage 1 cancers. Yet it…