1521 in science

List of years in science (table)
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The year 1521 in science and technology included many events, some of which are listed here.

Astronomy

• January – Antonio Pigafetta, sailing with Magellan's expedition, observes Magellanic Clouds.

Exploration

• Francisco de Gordillo explores the Atlantic coast up to South Carolina.
• March 6 – Ferdinand Magellan discovers Guam in the Mariana Islands.
• March 16 – Magellan reaches the Philippines.
• April 7 – Magellan arrives at Cebu Island.
• November 8 – Magellan's expedition, now led by Juan Sebastián Elcano, arrives in the Maluku Islands.

Medicine

• Jacopo Berengario da Carpi publishes Commentaria cum amplissimus additionibus super anatomiam Mundini in Bologna, containing the first printed anatomical illustrations taken from nature and including observation of the vermiform appendix.

Births

• Valentin Mennher, German mathematician (d. c.1571).
• approx. date – Richard Chancellor, English Arctic explorer (drowned 1556).

Deaths

• April 27 – Ferdinand Magellan, Portuguese explorer (born c.1480) (killed in the Philippines).
• July 8 – Jorge Álvares, Portuguese explorer.
• Francisco Serrão, Portuguese explorer.