Darwin: the naturalist who threw iguanas into the sea for science

Published on May 16, 2026 | Translated from Spanish

The biography of Charles Darwin written by Janet Browne reveals little-known facets of the father of evolution. During his voyage on the H.M.S. Beagle, the scientist did not hesitate to throw marine iguanas into the ocean to test their preference for water. The work, an abridged version of two previous volumes, explores his childhood marked by the death of his mother and his early obsession with collecting beetles.

Charles Darwin on the deck of the HMS Beagle during a storm, throwing a green marine iguana into the ocean, showing the reptile spiraling down towards the waves while the scientist observes with a notebook in hand, scientific experimentation process, technical elements: nautical compass, logbook with sketches, hanging mercury barometer, meteorological measuring instruments, historical cinematic style, golden twilight light, realistic details of wet wood and ropes, dark storm clouds, technical photorealism, dramatic composition with visible action.

From beetle collecting to modern scientific method 🧬

Darwin's childhood passion for insects laid the foundation for his methodological rigor. His technique of direct observation and experimentation, such as throwing reptiles into the sea to test hypotheses, anticipates the principles of current scientific development. In the era of genetic editing and artificial intelligence, this trial-and-error approach reminds us that science advances with concrete questions and physical actions, not just abstract theory.

Astronaut iguanas: the bizarre side of the origin of species 🦎

Imagine the respectable Charles Darwin, with his white beard, throwing lizards into the Atlantic as if they were stones. It wasn't cruelty, it was science: he wanted to know if marine iguanas preferred water or dry land. Today, if a biologist did that, it would be a worldwide Trending Topic for animal abuse. But in the 19th century, it was just a normal day on the Beagle. Good thing he didn't try the same with penguins.