1545 in science

The year 1545 in science and technology involved some significant events.

Botany

• Orto botanico di Padova and di Firenze botanical gardens established.

Mathematics

• Gerolamo Cardano publishes his algebra text Ars Magna, including the first published solutions to cubic and quartic equations.

Navigation

• Pedro de Medina's Arte de navegar is published in Valladolid, the first treatise on the art of navigation to be published in Europe.

Physiology and medicine

• Charles Estienne publishes De dissectione partium corporis humani, libri tres, including a description of the venous valves of the liver.
• Ambroise Paré publishes his first book, a treatise on battlefield medicine, ', in Paris.
• Thomas Phaer publishes The Boke of Chyldren, the first book on paediatrics written in English.