Radioactivity
peru was discoverd around the turn of the 16th century
Studying residues of uranium ores Marie Curie and Pierre Curie found that these residues are more radioactive than uranium; they attributed this radioactivity to unknown elements. They isolated these elements and named these elements polonium and radium.
me
no
peaple may think he discoverd it but he only discoverd parts of usa
Justin Bieber Posted A video of himself singing on youtube and got discoverd
the europeans
Polyphemus
canada
1777
1895