A question about epigenetics: how does methylation affect genes? In the process, learn how 2 meters of DNA can fit into one tiny cell!
This was a question from the #MendeleyWall, a giant wall in the Mendeley booth at the New Scientist Live conference where people wrote down the questions they had for science.
Illustrated by Claudia Stocker (vividbiology.com), narrated by Lisa Dennison of Science Sketches.