An unassuming fossilized slab in the basement of a museum in Brazil turned out to be 110-million-year-old dinosaur vomit, and inside that vomit were the bones of two strange, seagull-sized pterosaurs.

PLUS:

• Loss of fresh groundwater is now the leading driver of sea level rise
• How doubting your self-doubt makes you doubt less
• A huge black hole in a peculiar galaxy may date from the universe’s earliest moments 
• Shining a light on where viruses hide out in our bodies, and how they make us sick