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Christian Doppler invents the Doppler effect
The Doppler effect is when sound waves would have a higher frequency if the object was moving toward the observer and a lower frequency if the object was moving away. -
Dmitri Mendeleev invents the layout of the Periodic table
Dmitri arranged the elements in ascending order of atomic weight and grouping them by similarity of properties. He also predicted the existence and properties of new elements. Dmitri's organization surpassed attempts of many other chemists and inventors. -
Wilhelm Conad Röntgen discovers X-rays
X-rays are electromagnetic radiation in a wavelength range. They can also be referred to as Röntgen rays. X-rays are mostly used for bone related matters due to the fact bones are a very hard and dense tissue and they shows up clearly on X-rays. -
Alexander Fleming discovers Penicillin
Penicillin is considered to be a powerful drug that kill dangerous bacteria in our bodies that make us sick. Fleming discovered this drug by using mold and fungi in his lab.