NPR News: This Bird Can Remain Airborne For 10 Months Straight

This Bird Can Remain Airborne For 10 Months Straight
These birds fly from Europe to sub-Saharan Africa, but they don't touch down on the continent. The researchers say new findings raise questions about "when and to what extent swifts need to sleep."

Đọc thêm tại NPR
at October 28, 2016 at 04:38AM
Health & Science