The scientists used their data to chart where and when plant species emerged or disappeared across Siberia and Alaska.

An international team of researchers published a study in the journal Nature Communications, revealing new insights into life ...

"Many of them had feathers, [so] they could insulate themselves just like mammals can," Brusatte said. In addition, some ...

Initially believed to be a cold, arid grassland, the stretch more resembled the modern-day Yukon-Kuskokwim floodplain.