Images probe artery-hardening plaques
Close look reveals which deposits pose heart attack risks
![microscope image of plaques in a human artery](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/02/022016_scivis_feat_free.jpg?fit=860%2C460&ssl=1)
HAZARDOUS CLUMPS The protein collagen (green) coats plaque (red) on the wall of a human artery. These small pockets of plaque are vulnerable to breaking away and possibly triggering a heart attack.
J.D. Hutcheson et al/Nature Materials 2016