99
/ 100
True
Namib Desert
Welwitschia mirabilis is a plant in the Namib Desert that produces two leaves in its life, grows continuously, and is considered a living fossil. Some specimens are estimated to be 1,000 to 2,000 years old.
Infact verdict: True (99/100).
The claims about Welwitschia mirabilis are well-supported by multiple reliable sources. The plant is indeed endemic to the Namib Desert, produces only two leaves in its lifetime, and these leaves grow continuously, often getting split by desert winds. It is also considered a living fossil due to its ancient lineage and minimal evolutionary changes. Estimates of some specimens being between 1,000 and 2,000 years old are corroborated by several sources, confirming the plant's remarkable longevity.
How is this score determined? →Individual claims
100
True
Science
Welwitschia mirabilis is a plant endemic to the Namib Desert.
Multiple high-quality sources confirm that Welwitschia mirabilis is endemic to the Namib Desert, found in Namibia and Southern Angola. This is a well-documented fact.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
100
Web Consensus Weight
40
Source Quality Score
100
Source Quality Weight
20
Llm Reasoning Score
100
Llm Reasoning Weight
40
Llm Reasoning Score Raw
100
Weighted Total
100
Evidence Summary
2 high-quality web sources confirm endemic status.
100
True
Science
Welwitschia mirabilis produces only two leaves in its entire life.
The claim is supported by multiple reliable sources stating that Welwitschia mirabilis produces only two leaves that grow continuously throughout its life.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
100
Web Consensus Weight
40
Source Quality Score
100
Source Quality Weight
20
Llm Reasoning Score
100
Llm Reasoning Weight
40
Llm Reasoning Score Raw
100
Weighted Total
100
Evidence Summary
2 high-quality web sources confirm leaf production.
100
True
Science
Welwitschia mirabilis leaves grow continuously and get split into ribbons by desert winds.
Reliable sources confirm that the leaves of Welwitschia mirabilis grow continuously and are often split into ribbons by desert winds, which is a known adaptation to its environment.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
100
Web Consensus Weight
40
Source Quality Score
100
Source Quality Weight
20
Llm Reasoning Score
100
Llm Reasoning Weight
40
Llm Reasoning Score Raw
100
Weighted Total
100
Evidence Summary
2 high-quality web sources confirm leaf growth and splitting.
100
True
Science
Welwitschia mirabilis is considered a living fossil.
The term 'living fossil' is commonly used to describe Welwitschia mirabilis due to its ancient lineage and minimal evolutionary changes, as confirmed by multiple sources.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
100
Web Consensus Weight
40
Source Quality Score
100
Source Quality Weight
20
Llm Reasoning Score
100
Llm Reasoning Weight
40
Llm Reasoning Score Raw
100
Weighted Total
100
Evidence Summary
2 high-quality web sources confirm 'living fossil' status.
94
True
Science
Some Welwitschia mirabilis specimens are estimated to be between 1,000 and 2,000 years old.
Multiple sources estimate that some Welwitschia mirabilis specimens are between 1,000 and 2,000 years old, confirming the plant's remarkable longevity.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
90
Web Consensus Weight
40
Source Quality Score
90
Source Quality Weight
20
Llm Reasoning Score
90
Llm Reasoning Weight
40
Llm Reasoning Score Raw
90
Weighted Total
94
Evidence Summary
2 high-quality web sources confirm age estimates.
