Well, rats. A study of 16 cities shows that higher ambient temperatures and loss of green space are associated with increasing rodent complaints.

Science dioramas of yesteryear can highlight the biases of the time. Exhibit experts are reimagining, annotating — and sometimes mothballing — the scenes.

Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

In a lab test, chimps and orangutans can recognize their own reflection. But in the wild, baboons seemingly can’t do the same.