Nobody is credited for the discovery of Mars. However one cool fact about Mars is that like Venus, it’s visible with the naked eye.
Radium was discovered in 1898 by French physicist and Nobel laureate Marie Curie.
Gravity was discovered by the scientist Sir Isaac Newton.
Sulfur was discovered by Henning Brand in 1669. It was identified by Antoine Lavoisier in 1777.
X-rays were discovered in 1895 by Wilhelm Conrad Röntgen.
Electricity has always been around the world. The Ancient Greeks discovered that rubbing fur on amber caused an attraction between the two. Benjamin Franklin is considered the father of electricity.