The underwater caves of the Yucatán Peninsula are a window to the distant past. Through two million years and over multiple ...

This claustrophobia-inducing image is taken from photographer Martin Broen's new book Light in the Underworld, a collection ...

AKTUN TUYUL CAVE SYSTEM, ... Once a Mayan settlement, the city is among many in the Yucatan Peninsula that in recent decades have been converted into a party hub for vacationing foreigners.

Mexico's Yucatan tourist train sinks pilings into relic-filled limestone caves, ... The 950-mile line runs in a rough loop around the Yucatan peninsula and it's meant to connect beach resorts and ...

"The Yucatan platform is essentially a Swiss cheese of cave conduits," Osburn said. "We were curious which microbes are found together when we look across the whole system versus which microbes ...

AKTUN TUYUL CAVE SYSTEM, Mexico (AP) — Rays of sunlight slice through pools of crystal water as clusters of fish cast shadows on the limestone below. Arching over the emerald basin are walls of ...

Once a Mayan settlement, the city is among many in the Yucatan Peninsula that in recent decades have been converted into a party hub for vacationing foreigners. In the caves below, biologist ...

Aktun Tuyul Cave System, MEXICO (AP) — Rays of sunlight slice through pools of crystal water as clusters of fish cast shadows on the limestone below. Arching over the emerald basin are walls of ...

AKTUN TUYUL CAVE SYSTEM, Mexico (AP) — Rays of sunlight slice through pools of crystal water as clusters of fish cast shadows on the limestone below. Arching over the emerald basin are walls of ...