Add Yahoo as a preferred source to see more of our stories on Google. Galileo, holding two balls, about to perform his legendary experiment. Hulton Archive/Stringer via Getty Images If you drop a ...

A map of dark matter from 2021 using weak gravitational lensing data set. Credit: Dark Energy Survey. darkenergysurvey.org/des-year-3-cosmology-results-papers/. A map ...

Do you think that a heavy object and a lighter one dropped simultaneously will hit the floor at the same time? A new children's book, “Galileo's Leaning Tower Experiment,” by Wendy Macdonald, tells ...

Galileo’s closest approach to our planet in December 1990 allowed scientists to perform the first controlled experiment for the search for life on Earth from space. Ten months earlier, Voyager 1 had ...