Drug Testing on Animals is a thing of the past

For years, we have always used animals to test products designed for humans. However, scientists have determined that computer models of organs, such as the heart, are more accurate in testing new drugs developed for humans. These models can run from a few cells to a 3D model of the heart. The few cells can take a few minutes to run, whereas a complete 3D heart can take up to hours and use up a lot of energy. Despite this, scientists believe that this simulation has great potential in reducing the number of animals that will be used for drug testing, and that the testing of drugs for humans and its effects on our bodies will be more efficient with these simulations.

https://www.smithsonianmag.com/innovation/why-we-should-test-heart-drugs-on-virtual-human-instead-animals-180968588/