Fossil dung (coprolites) can reveal a surprising amount about a dinosaur's diet, including the types of plants they ate and even the presence of parasites. elaborate
The color of a grown crystal can be dramatically altered by adding tiny amounts of impurities, even at parts-per-million levels. elaborate
The accuracy of a sundial depends not only on its design but also on the observer's precise location and the equation of time, which accounts for the Earth's elliptical orbit. elaborate
The LD50, a common measure of toxicity, represents the dose of a substance that is lethal to 50% of a test population. It's not necessarily a precise measure for humans, as species can react very differently. elaborate
Citizen science projects have helped discover new planets orbiting distant stars. elaborate