HS-LS4-4

Construct an explanation based on evidence for how natural selection leads to adaptation of populations.

  1. Life

    Caught in the act

    Scientists observe some evolutionary speed demons as they adapt over the course of just a few years to new environmental conditions.

    By Alison Pearce Stevens
  2. Chemistry

    A plant enemy’s enemy

    Plants use chemicals to recruit help in fighting off pests.

    By Jill Richardson
  3. Fossils

    A really big (but extinct) rodent

    A rodent about the size of a bison once roamed the riverbanks of ancient Venezuela.

    By Emily Sohn