Pew Research Center is a nonpartisan, nonadvocacy fact tank that informs the public about the issues, attitudes and trends shaping the world.

Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data ...

The prospect of heat waves without end, increasingly destructive floods, relentless drought, rapidly rising sea levels, and the risk of “point of no return” tipping points require humanity to swiftly ...

Protists, eukaryotic unicellular organisms, play a crucial role in aquatic microbial food webs. Phagotrophic protists or ...