The oldest occupation features a monument with three interlocking enclosures. The center section offers a circular enclosure ...

Mars has long captured humanity’s imagination, especially given the tantalizing evidence of ancient river valleys and ...

Earth formed about 4.6 billion years ago, during the geological eon known as the Hadean. The name "Hadean" comes from the ...

Aldrich Potgieter (50), Nicolas Echavarria (51), Brian Campbell (55), Michael Kim (56), Bud Cauley (59), and Davis Thompson ...