Lenz has verified thousands of claims across science, politics, health, tech, and more. These are the topics people are checking most.
2,804 verifications avg. score 5.6/10 1,361 rated (mostly) true 1,191 rated (mostly) false
“Dinosaurs went extinct before 75 million years ago.”
Non-avian dinosaurs survived well past 75 million years ago. They went extinct at the Cretaceous–Paleogene boundary about 66 million years ago. A proposed decline in diversity beginning around 76 million years ago was not their extinction, and birds—which are dinosaurs—survived.
“Taj Hotel Mumbai has rats in its rooms.”
The allegation is unsupported by the cited material. One report concerns alleged bedbugs at a Taj property in Dehradun, not rats at the Mumbai hotel; the other is an uncorroborated 2008 guest review mentioning crows and pigeons near a food area, not rats in rooms. No cited source documents rats in guest rooms at Taj Hotel Mumbai.
“Google's stock price dropped significantly in August 2026.”
Google parent Alphabet’s two share classes fell about 5% to 6% from July 31 to August 31, 2026, supporting the description of an August drop. A roughly 4% one-day fall on August 5 reinforces that characterization. However, “significantly” is subjective, and widely reported figures of about 15% or nearly $700 billion describe a longer decline from May, not August alone.
“Under Fast4 tennis rules, service lets are not replayed.”
Fast4’s no-let rule means a service let is not replayed. Official USTA and Tennis Australia materials state that a serve touching the net remains in play when it lands in the correct service box, and the ITF describes the no-let procedure in the same terms.
“Tesla stock increased by 40% in 2022.”
Tesla shares moved sharply in the opposite direction, falling about 65% over the 2022 calendar year rather than gaining 40%. Final-year reporting and historical price data agree on the decline; estimates near 68-69% reflected late-December snapshots or different measurement points. An intra-year low-to-high comparison neither represents annual performance nor follows the year’s chronology.
“According to PostNord's E-commerce in the Nordics report, about 80% of Finns shop outside Finland's borders.”
PostNord’s recent data supports the approximately 80% figure. Its 2025–2026 publications say 80% of Finnish consumers made an online purchase from abroad during the previous year, up from 74% in an earlier period. The claim is slightly imprecise because it omits both the online-shopping context and the survey’s past-year timeframe.
“The European Central Bank held its deposit rate at 3.75% at its September meeting.”
Official records contradict both the stated decision and rate. At its September 2026 meeting, the ECB raised the deposit-facility rate from 2.25% to 2.50%; it did not hold it at 3.75%. Even if the claim meant September 2024, the ECB lowered the rate from 3.75% to 3.50% that month.
“Bernoulli's principle applies only to curved surfaces and cannot be applied to flat plate rudders.”
Surface curvature is not a requirement for applying Bernoulli’s principle. Fluid-mechanics sources apply Bernoulli’s equation to flat-plate flow and explain lift through pressure differences associated with the velocity field. A caveat about one curvature-based lift explanation near a sharp leading edge does not make Bernoulli’s equation inapplicable to flat-plate rudders.
“Men with excessive body fat mass tend to have insufficient androgen levels.”
Men with excess body fat are more likely to have lower testosterone, particularly with greater visceral adiposity. Observational and genetic evidence supports the association and suggests that increased fat mass can contribute to reduced testosterone. However, lower total testosterone does not always mean clinically significant androgen deficiency because free testosterone may remain normal.
“Cannabis lowers estrogen levels in women.”
Available evidence does not establish that cannabis lowers estrogen levels in women. Although preclinical research suggests cannabinoids could disrupt hormone-regulating pathways, direct human evidence is limited and has generally not shown a consistent reduction in estradiol. The claim turns a plausible mechanism into an unqualified causal effect that clinical research has not demonstrated.
“Smoking increases androgen levels in women.”
Smoking is generally associated with modestly higher levels of some androgens in women. A 2022 meta-analysis and several clinical studies support this pattern, although an earlier meta-analysis found no clear association for testosterone specifically. Because the evidence is predominantly observational and varies by hormone and menopausal status, it does not firmly establish that smoking directly causes an increase in every androgen across all women.
“Cannabis use increases androgen levels in women.”
Cannabis has not been shown to increase androgen levels in women generally. The study most suggestive of increased androgens involved only young men, while female-focused evidence is sparse, indirect and partly points toward hormonal suppression. A proposed association in heavy users with PCOS is too narrow and weakly supported to justify the claim’s broad causal wording.
“A crystal requires particles to be arranged in a highly regular microscopic pattern.”
Crystals require long-range order in the microscopic arrangement of their constituent particles. “Highly regular” accurately conveys this defining feature, provided it is not interpreted as requiring perfect periodic repetition: quasicrystals are aperiodic but still highly ordered. Authoritative crystallography and chemistry definitions directly support the claim.
“The phenomenon of strongly attractive gases restricting degrees of freedom is scientifically recognized as gaseous osmosis.”
The stated phenomenon is not scientifically recognized as gaseous osmosis. Technical sources use that term for selective gas or vapor transport across a semipermeable barrier, typically driven by molecular exclusion or pressure, concentration, or vapor-pressure gradients. No cited evidence links gaseous osmosis to intermolecular attraction restricting degrees of freedom.
“In Aristophanes' The Clouds, Socrates is lowered on a hammock.”
The play depicts Socrates descending in a suspended basket, not on a hammock. Multiple translations and scholarly discussions agree on the basket interpretation, while none of the cited evidence uses “hammock.” Uncertainty about the apparatus’s exact construction does not support substituting that term.
“Deadline Render Farm Server allows users to explicitly add workers through the Deadline Server UI.”
The documented interface does not match the one named in the claim. Deadline 10.4 allows Worker instances to be started or added through the Monitor, the Launcher, or the command line, but none is documented as a “Deadline Server UI.” The claim retains a limited kernel of truth because some Worker-instance controls are graphical.
“Median household income in the United States has not kept pace with inflation over the past two decades.”
Inflation-adjusted median U.S. household income increased overall during the past two decades, reaching $83,730 in 2024. Although income fell from 2004 to 2014 and dipped during downturns, that partial period excludes the subsequent recovery. The latest official data therefore contradict the claim’s broad characterization while preserving a limited truth about shorter intervals of stagnation or decline.
“Bittersweet chocolate contains cocoa flavanols with antioxidant properties that might support cardiovascular health.”
The evidence supports a potential cardiovascular benefit from cocoa flavanols in bittersweet chocolate. Research and regulatory reviews link sufficient cocoa flavanol intake to improved endothelial function and blood flow, alongside documented antioxidant properties. Benefits depend on the product’s flavanol content and should not be interpreted as proven prevention of heart attacks or other cardiovascular events.
“Chocolate can contain high amounts of calories, sugar, and fat.”
Commercial solid chocolate can be calorie-dense and contain substantial sugar and fat. Nutrition guidance, peer-reviewed reviews, and product data consistently support this limited wording. Individual amounts vary by chocolate type, formulation, and serving size.
“Statements about reincarnation were removed from the Roman Catholic Bible in the 16th century.”
Historical and textual evidence provides no basis for a 16th-century removal of reincarnation statements from the Catholic Bible. The Council of Trent reaffirmed the existing canon rather than excising such material, and no alleged reincarnation passage has been shown to exist in an earlier Catholic Bible and disappear afterward. Vulgate textual revisions do not establish doctrinal deletion.