27 factors that make you vulnerable to COVID-19

Using data from the CDC, public health resources, and reporting, Stacker compiled a list of 27 population groups that are vulnerable to COVID-19. For each group, Stacker compiled data on this population’s distribution across the United States.

Do you know your state tree?

Stacker compiled a list of each state’s official state tree and researched the history and cultural ties of each one to help our readers quiz themselves.

American plants that have gone extinct

The world is facing an extinction crisis, and it has ramifications for our backyards. Stacker used a database of extinct plants published in Nature this past June (Humphreys et al. 2019) to develop a list of 21 plants that were lost to science here in America.