Ancient Life Found in Antarctica's 'Blood Falls' Unveils Secrets

WHO:

Gizmodo - Andrew Allen, a marine biology professor at the Scripps Institution of Oceanography, is a co-author of the study.

WHAT:

Gizmodo - The study found that nearly all microorganisms in the red ice, mud, and sediment at the glacier's terminus were associated with marine environments, contrasting with freshwater and terrestrial populations at surrounding sites.

Gizmodo - The glacier terminus shared far more eukaryotic species with nearby marine samples than at other Dry Valley sites, indicating Blood Falls’ possibly ancient marine origins.

Gizmodo - The findings suggest that future studies could investigate the microorganisms living in Blood Falls to better understand when the subglacial water became trapped.

Gizmodo - Scientists discovered a community of microorganisms in the waters of Blood Falls, indicating the water is of ancient marine origin.

Gizmodo - The study published in the journal Nature Geoscience analyzed 167 samples of water, sediment, and air from the McMurdo Dry Valleys region.

WHERE:

Gizmodo - Blood Falls is located at the edge of the Taylor Glacier in the McMurdo Dry Valleys of Antarctica.

Gizmodo - The research focused on the Taylor Valley, which is more than 20 miles from the ocean.

WHY:

Gizmodo - The findings offer insights into how microbial communities can persist through major environmental transitions.

Gizmodo - Prior geochemical research suggested that the water feeding Blood Falls could be ancient seawater trapped beneath the glacier during past warm periods.

HOW:

Gizmodo - Researchers used a suite of genetic techniques to identify eukaryotic and prokaryotic groups in the samples, contributing to the evidence for the relic marine system at Blood Falls.

Gizmodo - Researchers used a suite of genetic techniques to identify eukaryotic and prokaryotic groups in the samples.

Gizmodo - The study found that microorganisms in the red ice, mud, and sediment at the glacier's terminus were primarily associated with marine environments, contrasting with freshwater and terrestrial populations at surrounding sites.

(UPDATED August 3, 2026 22:04 UTC)

A recent study has revealed that nearly all microorganisms found in the red ice, mud, and sediment at Blood Falls' glacier terminus are linked to marine environments, which is quite different from the freshwater and terrestrial populations found nearby. The research indicates that this glacier terminus shares a greater number of eukaryotic species with local marine samples compared to other sites in the Dry Valleys, suggesting that Blood Falls may have ancient marine origins. These findings pave the way for future investigations into the microorganisms residing in Blood Falls, helping scientists understand when the subglacial water became trapped and how microbial communities have survived significant environmental changes.

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(UPDATED August 3, 2026 20:37 UTC)

Scientists have uncovered a community of microorganisms in the waters of Blood Falls, suggesting that the water has ancient marine origins. The study, co-authored by marine biology professor Andrew Allen from the Scripps Institution of Oceanography, analyzed 167 samples from the McMurdo Dry Valleys region in Antarctica, specifically focusing on the Taylor Valley, which is over 20 miles from the ocean. Researchers utilized various genetic techniques to identify eukaryotic and prokaryotic groups, revealing that the microorganisms found in the red ice, mud, and sediment at the glacier's terminus are primarily linked to marine environments, unlike those at nearby freshwater and terrestrial locations.