Test your vision and attention to detail with this needle in a haystack seek-and-find brain teaser created by Gergely Dudás, a graphic artist from Budapest, Hungary.

The number of needles in the haystack is the prevalence of a disease. The differences in needle and hay are equivalent to the power of the test. My ability to sort needles from hay is described by ...

Sachsalber gave himself 24 hours to find the needle by hand, during which the entire event would be broadcasted on French TV. His method is pretty simple: take a handful of hay, not too large a ...

GPs could soon be able to screen patients for Alzheimer’s disease using a finger-prick test. The test, which is the size of a credit card, uses “needle in a haystack” precision to detect ...