Researchers Discovered Heat-Resistant Amoeba Species

The newly identified organism survives temperatures that surpass the previous thermal record for complex life.

Updated on Sept. 22, 2026 in Life Sciences

Macro view of a single translucent amoeba drifting in clear, particle-filled water from a geothermal spring. — Researchers identified Incendiamoeba cascadensis, a new amoeba species from Lassen Volcanic National Park capable of surviving temperatures exceeding 145 degrees Fahrenheit. AI Illustration. Upload story photo >

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Scientists have identified a new amoeba species, Incendiamoeba cascadensis, capable of reproduction and movement at temperatures exceeding 145 degrees Fahrenheit. This discovery, published in the journal Cell, establishes a new upper thermal limit for complex eukaryotes.

Why it matters

The finding pushes the known boundaries of eukaryotic life, which typically exhibits lower heat tolerance than simpler bacteria or archaea. Identifying how this organism manages extreme thermal stress provides new insights into cellular survival mechanisms in volatile environments.

Incendiamoeba cascadensis demonstrates mobility at 147 degrees Fahrenheit and reproduction above 145 degrees Fahrenheit, clearing the previous record of 140 degrees Fahrenheit. Researchers confirmed these capabilities by sequencing the genome and monitoring cultures in specialized incubators.

The players

Syracuse University

An academic institution where the research team responsible for the collection and analysis of the amoeba is based.

The details

The research team collected samples from geothermal streams in Lassen Volcanic National Park to isolate the organism. By sequencing the genome and conducting controlled incubator tests, they found that the amoeba likely relies on unique proteins in its outer membrane to maintain structural integrity. The study indicates that the microbe modifies its movement speed and biological behavior to survive at these elevated temperatures, a capability rare for complex eukaryotes.

Samples were collected from Lassen Volcanic National Park between 2023 and 2025.
The study was published in the journal Cell on September 22, 2026.

The Tech Race

The discovery of Incendiamoeba cascadensis extends the established baseline for eukaryotic life in extreme environments, marking a departure from the historical dominance of bacteria and archaea in thermotolerance research. This finding creates a new benchmark for biologists studying cellular resilience in geothermal systems.

This discovery remains a fundamental scientific finding and does not currently impact consumer products or public workflows. Future research may explore if these heat-management proteins have potential applications in synthetic biology or high-temperature industrial processes.

The takeaway

This discovery highlights how much remains unknown about the upper thermal limits of complex organisms in extreme geothermal niches. Future research will likely focus on discovering similar organisms within these streams to determine if this heat-management strategy is widespread.