Glaciers once inched toward the sea, gouging rocks. When the ice masses melted, they infused oceans with nutrients that may ...
The Walker circulation, an atmospheric circulation pattern in the tropics, has accelerated in recent years, puzzling climate ...
In the 1970s, images from the NASA Mariner 9 orbiter revealed water-sculpted surfaces on Mars. This settled the ...
Since 1996, conflict in eastern DRC has led to approximately six million deaths. The First Congo War (1996–1997) began in the wake of the 1994 Rwandan Genocide, during which ethnic Hutu ...