We found 0 facts that have been updated since 2020.
Camels store water in their humps to survive in the desert.
Camels store fat in their humps, not water. Water conservation comes from efficient kidneys, concentrated urine, and tolerance to dehydration.
The adult brain is hardwired and cannot generate new neurons.
Neurogenesis (new neuron growth) occurs in the adult hippocampus and possibly other regions. The brain is plastic throughout life.
Goldfish have a memory of only 3 seconds.
Goldfish can remember things for months, recognize their owners, and learn complex tasks.
Different parts of the tongue detect different tastes: sweet on the tip, bitter on the back.
All taste buds can detect all five basic tastes. There are no tongue zones.
The Great Wall of China is the only human-made object visible from space (or from the Moon).
The Great Wall is very difficult to see with the naked eye from low Earth orbit and is not visible from the Moon. Many structures (cities, highways, airports) are more visible.
Shaving makes hair grow back thicker, darker, or faster.
Shaving only cuts hair at the surface. It does not affect growth rate, thickness, or color. The blunt tip may feel coarser temporarily.
COVID-19 spreads primarily through large respiratory droplets and surface contact. Masks are not recommended for the general public.
COVID-19 spreads through both aerosols (small airborne particles) and droplets. Surface transmission (fomites) was overstated. Masks significantly reduce transmission.
Cracking your knuckles causes arthritis.
No study has found a causal link between knuckle-cracking and arthritis. One doctor cracked only one hand's knuckles for 50 years with no difference.
If you drop food on the floor and pick it up within 5 seconds, it's still safe to eat.
Bacteria transfer to food almost instantly upon contact. The '5-second rule' has no scientific basis.
Giving children sugar makes them hyperactive.
Controlled studies show no consistent causal link between sugar and hyperactivity. Parental expectations likely explain the perceived effect.
Students have distinct learning styles (visual, auditory, kinesthetic) and should be taught according to their preferred style.
There is no scientific evidence supporting the 'learning styles' hypothesis. Teaching to a preferred style does not improve outcomes.
People are left-brained (logical) or right-brained (creative).
Both hemispheres work together. Functions are not neatly divided by personality type.