Animal experiments have long been a subject of heated debate. On one hand, many people argue that they are necessary for scientific and medical advancement. Countless treatments we rely on today—like vaccines, antibiotics, and even chemotherapy—were once tested on animals before they could be safely used on humans. Those in favor believe it would be irresponsible to bypass this step entirely, especially when human lives are at stake. They also point out that, in many cases, current alternatives like computer simulations or tissue cultures still can’t fully replace a living organism when complex systems like metabolism or immunity are being studied.