Photo-sharing app Snapchat has been slammed by users after its Nobel Laureate Marie Curie filter on Women's Day added mascara and eyeshadow to users' faces. "Shoutout to Snapchat for adding eyelashes to the Marie Curie filter. Forgot that's what she was famous for," tweeted a user. Previously, Snapchat faced flak for a Bob Marley filter for darkening users' skin.