Why do scientists think that whales evolved from ancient mammals and not ancient fish

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Long term exposure to waves can cause sunburns and skin cancer.

Blank is a rock with a find dark texture that makes up the oceanic crust