1520 in science
The year 1520 in science and technology included many events, some of which are listed here. Botany
 Publication of Le Grant Herbier ("The Great Herbal") in Paris. Exploration
 November 1–28 – Ferdinand Magellan's fleet makes the first passage of the Strait of Magellan and he names the Pacific Ocean. Births
 approx. date – Vincenzo Galilei, Italian scientist and musician (died 1591)
 Agatha Streicher, German physician (died 1581)

Deaths
 approx. date – Pedro Álvares Cabral, Portuguese explorer (b. c. 1467/8). References

 
16th century in science
1520s in science