Smithsonian Magazine on MSN

An asteroid ended the age of the dinosaurs. But how did their reign begin? Mysterious early reptiles may hold the answer

A small but fierce jawbone sits in Argentina’s natural science museum in Buenos Aires. Six inches long and studded with backward-curving fangs that would have hooked into flesh to rip it open, the ...
ZME Science on MSN

Where did dinosaurs come from? New evidence points to the equator

A small fossil jaw rests in Argentina’s national natural science museum in Buenos Aires. The fossil, only six inches long, ...