Beneath the land surface of the Bahamas, the underwater caves known ... But during the last ice age when sea levels were much lower, the caves were the high-and-dry habitat for a completely ...

Sistema Sac Actun, the world's largest underwater cave system, spans an impressive ... shedding light on the Ice Age and early human history in the Americas. Despite its significance, Sistema ...

The underwater caves of the Yucatán Peninsula are a window ... and their reach expanded. During the ice ages, the caves dried out as the sea level dropped, and the seeping water from the surface ...

But there is hope, says Thymann, and documenting this dense habitat of underwater caves may be the first step in protecting the manatees that live there. Receive a weekly dose of discovery in your ...

Winter in Alaska has waterfalls frozen mid-cascade, ice caves so blue they look unreal, and lakes so clear you can skate ...

The pair planned to explore the Cueva del Agua area, an underwater cave system in Spain ... She has continued rock and ice climbing, hiking in the High Peaks of the Adirondacks, and paddling ...