---
title: Plesiosaurus
description: "Dalle origini del pianeta alle grandi estinzioni. Un viaggio attraverso 4 miliardi di anni di storia, dalle prime forme di vita dell'Adeano ai giganti del Mesozoico e oltre."
author: Angelo Denitto
---

![](https://noidinosauri.it/images/encyclopedia/marine-life/plesiosaurus/plesiosaurus-mouth-of-a-river-jurassic.webp)

![](https://noidinosauri.it/images/encyclopedia/marine-life/plesiosaurus/plesiosaurus-mouth-of-a-river-jurassic.webp)

## Curiosity - Did you know?

Erase the image of the neck erected out of the water in a swan curve. A biomechanical error rooted in 19th-century illustration. Tomographic scans of the cervical vertebrae prove the joints and ligaments were inflexible. Raising the head vertically against gravity would have shattered the spine. The neck operated horizontally. A vector of stealth approach. Below the surface, the head infiltrated schools of prey fractions of a second before the hydrodynamic mass of the body triggered flight receptors.

IMPORTANT - Some statements regarding behavior, coloration, and sensory abilities reflect ongoing scientific hypotheses, not established certainties.