What ethical issues have been raised by the scientific community's commitment to ensuring that experimental treatments are not used on patients?

The issue of endangering patients health with an unknown experimental treatment. So they test these treatments on animals.

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun.