Top 10 stories of 2019: A black hole picture, measles outbreaks, climate protests and more
The first-ever picture of a black hole was the easy top pick for our story of the year, followed by stories on new and reemerging health risks, a wake-up call on climate change, a claim of quantum supremacy and more.
GWEN KERAVAL
Science is good at measuring progress — and where we fall short.