Unnatural Selection May 2026

The use of CRISPR-Cas9 allows researchers to manipulate DNA by changing RNA guides to insert specific sequences. In 2018, this led to the controversial birth of the first CRISPR-edited babies in China.

Pollution and habitat fragmentation force rapid adaptation. For example, North American songbirds have modified wing shapes to survive deforested areas, and sea snakes in polluted waters have developed darker skin to shed toxins more efficiently. Unnatural Selection

In modern biology, "unnatural selection" describes how human activity—rather than natural environmental pressures—forces species to evolve. Key areas include: The use of CRISPR-Cas9 allows researchers to manipulate