Alive May 2026

: All living things are composed of one or more cells, which contain DNA and organized structures.

: The ability to maintain a stable internal environment (like body temperature) despite changes in the outside world.

In science, "alive" refers to organisms that perform specific vital functions. While there is no single perfect definition, biologists generally agree on seven key characteristics that distinguish living things from non-living matter: : All living things are composed of one

: Living things increase in size or complexity over time throughout their lifespan.

: Life requires energy to function. Organisms either produce their own food (like plants) or consume others to fuel biological processes. While there is no single perfect definition, biologists

: Over generations, populations of living things change to better survive in their specific environment. 2. The Human Experience: What It Means to "Feel Alive" What Really Makes Us Feel Alive (And Why We've Forgotten)

: The capacity to produce offspring, either sexually or asexually, to ensure the continuation of the species. : Over generations, populations of living things change

: Organisms react to their environment, such as a plant growing toward light or an animal fleeing from a loud noise.