experiments

How torsion balances, the Apollo 15 feather drop, and the MICROSCOPE satellite tested whether all matter falls alike, now to a few parts per quadrillion.

In 1912 Victor Hess carried electroscopes to 5,350 m in a balloon and found radiation rising with height. Here is how the flights worked and what they proved.

On April 8, 1911, Kamerlingh Onnes watched the resistance of mercury vanish in liquid helium. How the experiment worked and why it surprised him.

Every landmark science experiment in one hub: Pasteur's swan-neck flask, Galvani's frog legs, Eratosthenes, Michelson–Morley, Hafele–Keating and more than 140 others, grouped by field and era.

CRISPR turned a bacterial immune system into a gene-editing tool. This article explains the discovery, mechanism, clinical results, and ethical stakes.

The Event Horizon Telescope created the first black hole image by linking radio telescopes across Earth. Here is how the experiment worked.

The Human Genome Project sequenced all 3 billion base pairs of human DNA for $2.7 billion. Here is how the 13-year effort worked and why it still matters.

Voyager used rare planetary alignment, gravity assists, and durable engineering to transform knowledge of the outer Solar System.

The 1964 murder of Kitty Genovese launched a landmark psychology experiment. Here's what Darley and Latané actually found — and why the original story was wrong.