Some animals migrate thousands of miles—across oceans, deserts, and even continents without a map, GPS, or clear explanation.

The story of two of the strangest animals on the planet just got a little stranger ... Therefore, he said, monotremes provide a window into the origins of mammals on Earth. A new study published ...

The story of two of the strangest animals on the planet just got a little ... monotremes provide a window into the origins of mammals on Earth. A new study published Monday in the journal ...