169 Science claim verifications avg. score 5.1/10 67 rated true or mostly true 97 rated false or misleading
“A tomato is botanically and/or culinarily classified as a vegetable.”
The claim is largely accurate on its culinary prong: multiple authoritative sources (PubChem/NIH, Britannica, U.S. legal precedent) confirm tomatoes are considered vegetables for culinary, nutritional, and legal/customs purposes. However, the botanical prong is clearly false — tomatoes are botanically classified as fruits (specifically berries), not vegetables. Because the claim uses "and/or," only one prong needs to hold, and the culinary classification is well-established. The inclusion of "botanically" is misleading but does not invalidate the overall statement.
“Sound can have a negative decibel level.”
Sound can indeed have negative decibel levels. The decibel scale uses a logarithmic ratio formula, so any sound intensity below the chosen reference point mathematically produces a negative dB value. This is confirmed by multiple academic physics sources and occurs in both digital audio systems and theoretical acoustic measurements.
“Teaching students according to their preferred learning styles (visual, auditory, or kinesthetic) improves educational outcomes.”
This claim is not supported by scientific evidence. Multiple high-quality meta-analyses and reviews — including a 2024 PMC meta-analysis and publications from the APA, AFT, and leading cognitive science journals — consistently find no convincing evidence that matching instruction to students' preferred learning styles (visual, auditory, kinesthetic) improves educational outcomes. The "meshing hypothesis" is widely classified as a neuromyth by cognitive scientists. Academic performance is better explained by factors like background knowledge, motivation, and study strategies.
“The "five-second rule" — the belief that food dropped on the floor is safe to eat if picked up within five seconds — prevents the transfer of harmful bacteria to food.”
The five-second rule does not prevent harmful bacteria from transferring to dropped food. Peer-reviewed research, including a comprehensive 2016 Rutgers study, shows bacteria can transfer to food in less than one second upon contact. While longer contact times may increase contamination, there is no safe window. Factors like moisture, surface type, and contamination level often matter more than time. The claim is not supported by scientific evidence.
“Carbon capture and storage technology is an effective and scalable solution for achieving net-zero emissions.”
CCS technology is technically effective at capturing CO₂ from point sources (~90%+ efficiency) and is considered necessary in most net-zero scenarios — particularly for hard-to-abate industrial sectors. However, calling it "an effective and scalable solution" significantly overstates its role. The IEA's 2025 World Energy Outlook projects CCUS contributing under 5% of emissions reductions by 2050. Current deployment (~50 Mtpa) is a fraction of what's needed, and major barriers — high costs, infrastructure gaps, and financing challenges — remain unresolved. Authoritative sources consistently describe CCS as "critical but limited" and "complementary," not a primary scalable solution.
“When a worm is cut in two, it regenerates into two separate worms.”
This is a popular myth that's only partially true. Some worm species — notably planarian flatworms — can indeed regenerate into two complete worms when cut in half. However, the common earthworm, which most people picture when they hear "a worm," cannot do this. Typically only the head end survives; the tail end dies. Regeneration into two individuals is a species-specific ability, not a universal worm trait. The claim misleadingly presents an exception as a general rule.
“The human brain uses 20% of the body's total oxygen supply.”
The claim is well-supported by multiple peer-reviewed biomedical studies confirming that the adult human brain consumes approximately 20% of the body's total oxygen at rest. This is a widely accepted figure in neuroscience. Minor caveats: the figure applies specifically to adults in a resting/basal state, some sources cite a 15–20% range, and the proportion is significantly higher in young children. These are standard qualifications that don't undermine the claim's core accuracy.
“Standardized testing predicts future academic success more accurately than other assessment methods.”
This claim significantly overstates the evidence. Standardized tests like the SAT and ACT do predict college GPA and add value beyond high-school grades in some models. However, multiple large-scale, peer-reviewed studies find that high-school GPA is a stronger predictor of longer-term outcomes like college graduation. The research consensus is that combining test scores with other measures yields the best predictions — not that tests alone are superior. The claim's absolute framing ("more accurately than other assessment methods") is not supported by the literature.
“Some species are biologically immortal and can potentially live indefinitely.”
Some organisms (e.g., hydra; “immortal jellyfish”) show negligible senescence or can revert life stages, which is sometimes called “biological immortality.” But the cited sources often hedge (“in theory,” “don’t seem to age”), and none show individuals actually living indefinitely in nature. Without that context, the claim overstates what’s proven.
“Romantic love typically lasts no more than three years in most relationships.”
The claim conflates early-stage passionate intensity — which research does show fading within roughly 1–3 years — with romantic love broadly. Multiple high-authority sources, including the American Psychological Association and Harvard Medical School, explicitly distinguish these constructs. Neuroimaging studies show couples married over 20 years can exhibit the same dopamine-rich romantic brain activity as newly in-love individuals. The blanket assertion that romantic love "typically lasts no more than three years in most relationships" is not supported by the preponderance of scientific evidence.
“Domestic cats can live more than 30 years.”
Guinness World Records has verified that a domestic cat named Creme Puff lived 38 years and 3 days, directly proving that domestic cats can surpass 30 years of age. The claim uses "can," which asserts biological possibility — and even a single verified case is sufficient to establish that. While such longevity is extraordinarily rare (the average cat lifespan is roughly 12 years), rarity does not negate possibility.
“Honey does not spoil over time under normal storage conditions.”
The claim is largely accurate. Honey's unique chemistry — low water activity, high sugar content, acidity, and natural antimicrobial compounds — makes it extraordinarily resistant to microbial spoilage when stored sealed and dry at room temperature. Peer-reviewed studies confirm stability over extended periods. However, the claim overstates things slightly: honey can ferment if it absorbs moisture (a realistic household risk), and it does undergo gradual quality changes like flavor loss and darkening over time. It won't make you sick, but "does not spoil" without qualification is an oversimplification.
“Animals can develop allergic reactions to humans.”
The claim is largely accurate. Multiple veterinary dermatologists and biomedical sources confirm that animals — particularly dogs and cats — can develop allergic reactions to human dander (shed skin cells and hair proteins). The underlying immune mechanisms are well-established. However, such allergies appear to be uncommon, prevalence figures vary widely depending on the study population, and diagnostic testing has limitations. The claim is valid but would benefit from noting that these reactions are rare and specific to human dander rather than to humans broadly.
“If all the world's bacteria were stacked on top of each other, the resulting column would stretch approximately 10 billion light-years.”
The claim that stacked bacteria would stretch "10 billion light-years" is misleading. Using the most widely cited estimate of ~5×10³⁰ bacteria at ~2 µm average length, the stack reaches roughly 1 billion light-years — a full order of magnitude less. Even generous assumptions (including archaea) yield ~6 billion light-years. The only sources citing "10 billion" are popular trivia pages, while the original 1998 Whitman estimate actually claimed "a trillion light-years." The general concept of an astronomically vast distance is valid, but the specific figure is not mathematically supported.
“There is more fresh water stored underground as groundwater than in all rivers and lakes combined.”
This claim is true. Multiple authoritative sources — including the U.S. Geological Survey and peer-reviewed research in Nature Geoscience — confirm that fresh groundwater vastly exceeds the volume of water in all rivers and lakes combined, by roughly 100:1 or more. Even conservative estimates of fresh groundwater alone (~10.6 million km³) dwarf the ~105,000 km³ in rivers, lakes, and streams. Note that ice and glaciers still hold more freshwater than groundwater overall, but the claim's specific comparison is well-supported.
“The continent of Africa has land in all four hemispheres: Northern, Southern, Eastern, and Western.”
The claim is true. Africa's landmass is crossed by both the Equator (dividing Northern and Southern Hemispheres) and the Prime Meridian (dividing Eastern and Western Hemispheres), placing it in all four hemispheres. This is confirmed by multiple credible geographic sources including WorldAtlas, Royal Museums Greenwich, and others. The East/West division relies on the conventionally chosen Prime Meridian at Greenwich, but this is the universally accepted standard in geography and cartography.
“Tardigrades are capable of surviving exposure to the conditions of outer space.”
The claim is true. Multiple independent, high-authority sources — including NASA, ESA, NSF, and peer-reviewed research — confirm that tardigrades have survived real exposure to outer space conditions. In the 2007 FOTON-M3 mission, tardigrades survived space vacuum for 10 days and even reproduced afterward. Survival is time-limited and reduced under intense solar UV radiation, but the demonstrated capability to survive space exposure is well-established scientific fact.
“It is possible to create diamonds from peanut butter using scientific methods.”
It is technically possible to convert carbon from peanut butter into diamond under extreme laboratory pressure, as demonstrated by geophysicist Dan Frost at Germany's Bayerisches Geoinstitut. Diamond crystals did form before hydrogen released from the peanut butter destroyed the apparatus. However, this was a single, unreplicated demonstration — not a peer-reviewed or repeatable method. Established diamond synthesis uses pure carbon feedstocks, not complex organic mixtures. The claim is literally true but gives a misleadingly optimistic impression of feasibility.
“Humans use only 10 percent of their brain capacity.”
This is one of the most persistent myths about the brain, but it is definitively false. Modern brain imaging (fMRI, PET scans) shows that humans routinely use all parts of their brain — not just 10%. Even during rest, widespread neural networks remain active. Harvard Health calls the claim "100% fiction," and MIT's McGovern Institute confirms we use our entire brain every day. The brain consumes roughly 20% of the body's energy, which would be biologically wasteful if 90% were unused.
“Planting a large number of trees is the most effective immediate solution to climate change.”
This claim is false. While tree planting is a valuable part of climate strategy, calling it the "most effective immediate solution" is contradicted by overwhelming scientific evidence. Studies in Nature Climate Change and from NASA show that all reforestation potential over 30 years would offset less than one year of global emissions. Trees take decades to store substantial carbon — the opposite of "immediate." The scientific consensus is clear: reducing fossil fuel emissions is far more effective and remains the essential priority.