Two researchers from the University of Texas at Austin have uncovered fossil remains of Ice Age animals inside a submerged cave in Central Texas. The find is offering rare insight into the region’s prehistoric life.
John Moretti and John Young discovered while snorkeling through an underwater passage in Comal County. The site, known as Bender’s Cave, had not been mapped before and lies on private land.
Inside the cave, the researchers found a large number of fossilized bones spread across the floor. The remains had stayed undisturbed for thousands of years, creating a well-preserved record of ancient animal life.
Fossils reveal Ice Age species
The fossils include remains of saber-tooth cats, giant sloths, and large armadillo ancestors. Some of these armored mammals were as large as modern lions. Researchers say these animals lived in Central Texas during the last interglacial period, a warmer phase of the Ice Age around 100,000 years ago.
Scientists believe the bones entered the cave through natural openings such as sinkholes. Over time, erosion and flooding likely carried the remains underground. Once inside, the cave’s stable conditions helped preserve them.
Moretti said the number of fossils found in the cave was unusual. He described the site as covered with bones, unlike anything he had seen in similar environments.
A new view of Central Texas’ past
Researchers say the discovery is important because fossils from this time period have not been identified in Central Texas before. The site could provide new evidence about the region’s ancient landscape, climate, and animal communities.
Ice Age #fossils discovered in an underwater cave in #Texas are giving scientists a rare look at prehistoric life. Researchers found remains of saber-tooth cats, giant sloths, and more, which have been preserved for thousands of years. pic.twitter.com/afzS4k8YrQ
— Tom Marvolo Riddle (@tom_riddle2025) April 6, 2026
The findings suggest that Central Texas may have supported a wider range of large animals than previously understood. This points to environmental conditions that were different from those seen today.
Wider implications across Texas
The discovery is also drawing attention to Texas’ large number of caves. Many of these sites remain unexplored and could contain similar fossil deposits. Scientists say these caves may hold valuable clues about the state’s geological and climate history.
David Ledesma, who was not involved in the study, said the findings include species not expected in this part of Texas. He noted that discoveries continue to change scientific understanding of the region.
Additional fossils found in the Dallas area and along the Gulf Coast support this idea. These include remains of giant tortoises, ground sloths, and pampatheres, an extinct relative of modern armadillos.
Researchers say the findings raise new questions about what Central Texas looked like thousands of years ago. They also suggest that more discoveries may still lie hidden underground.
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