Now, more than a decade later, new analysis of the fossils has found that they belong to a new 73-million-year-old species, according to a study published Jan. 28 in the peer-reviewed journal ...

Immigration and border security will be the likely focus of U.S.-Mexico relations under the new Trump administration. But ...

When my friend Marilyn and I left Grand Canyon National Park we were on the Navajo Reservation, which covers parts of ...

One photographer put the age of starlight into perspective with stunning projections on some of Earth's oldest rock ...