Summary:

- The U.S. Food and Drug Administration (FDA) is shifting away from animal testing for new drug approvals. This is a significant change in the drug development process.

- The move towards alternative testing methods, such as computer simulations and human cell-based models, aims to reduce the use of animals in medical research. This is seen as a more ethical and potentially more effective approach.

- The news has caused a decline in the stock prices of companies that specialize in animal testing, as their business model may be impacted by this regulatory shift.