The design of the header (slides down if you scroll up) combined with the banner above it makes for a terrible UX on a phone. It takes up so much space that you can barely read the article. The dropdown on scroll behavior is also so sensitive that it makes it really hard to stop it and read.
Agreed. It's absolutely awful. Even a slight scroll up makes it show up again which is horribly inconvenient when you're trying to go back and forth between the graphics and the text describing them.