After December 31, 2020, Flash animation technology is no longer supported by web browsers. Several DNALC educational sites were built using Flash, especially those featuring animations.
Some of our sites will be retired, but much of the animation and video content is available in the Resources section.
In addition, we are reworking our most valued, up-to-date content into current technologies. If there is an animation you can no longer find, please email email@example.com.