vendredi 7 mai 2021

Earth’s land may have formed 500 million years earlier than we thought

Earth’s continental crust may have emerged 500 million years earlier than scientists had previously estimated. Pinning down when our planet’s land emerged could help us understand the conditions in which primitive life began.

New Scientist Default Image

An artist’s impression of the early Earth Simone Marchi/SwRI

3,2/ L'immunité adaptative

Objectifs : Par l’étude d’un cas d'une infection virale (par exemple la grippe), comment se mettent en place les défenses adaptatives et comment, en collaboration avec les défenses innées, elles parviennent à l'élimination du virus.