This week what is special about the word pneumonoultramicroscopicsilicovolcanoconiosis, and, more importantly, what does it mean? Also, how do viruses and bacteria differ, does growing an Afro make you thin, how does body temperature vary across the day, does clipping hair and nails make them grow faster, and how do hair loss remedies work? Dr Chris Smith and Talk Radio 702's Refilwe Moloto have the answers... Like this podcast? Please help us by supporting the Naked Scientists