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78
Mostly True United States

The text describes how a wood frog freezes entirely in winter, including its heart stopping, and then thaws and returns to normal activity in summer.

The claims about the wood frog's ability to freeze and thaw are well-supported by multiple credible sources. The evidence indicates that wood frogs can indeed freeze during winter, with their hearts stopping temporarily. This process is a biological adaptation that allows them to survive extreme conditions and resume activity in the spring.

May 17, 2026 Language: en 3 claims analyzed

Individual Claims

82
True Biology
During the winter, a wood frog allows itself to freeze entirely.
Multiple sources, including the National Park Service and Wikipedia, confirm that wood frogs freeze solid during winter, allowing ice to form around their organs and under their skin. This adaptation helps them survive freezing temperatures.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 90
Web Consensus Weight 50
Source Quality Score 85
Source Quality Weight 25
Llm Reasoning Score 90
Llm Reasoning Weight 25
Weighted Total 82
Evidence Summary 3 web sources confirm freezing behavior of wood frogs.
78
Mostly True Biology
The wood frog's heart stops beating when it freezes.
The wood frog's heart stopping while frozen is confirmed by several credible sources, including a study indexed in PubMed and the National Park Service, which note the complete suspension of vital functions, including the heartbeat, during winter.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 85
Web Consensus Weight 50
Source Quality Score 80
Source Quality Weight 25
Llm Reasoning Score 85
Llm Reasoning Weight 25
Weighted Total 78
Evidence Summary Documentation and web sources confirm the frog's heart stops during freezing.
74
Mostly True Biology
In the summer, the wood frog thaws and jumps away.
According to sources like the Forest Society and the National Park Service, wood frogs thaw from the inside out in spring, regaining full activity. This process allows them to recover from the frozen state and continue survival functions.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 50
Source Quality Score 75
Source Quality Weight 25
Llm Reasoning Score 80
Llm Reasoning Weight 25
Weighted Total 74
Evidence Summary Sources describe thawing process and return to activity.

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