Save. teachpe.com. On the surface, human bones---especially dead ones---seem to be made of rigid material. However, the make-up of bones is quite complex--they are alive, growing and changing connectors in the human body. Bones are not completely solid, but rather a mixture of elements that range from soft to hard.
Kept under lock and key, the Devils Hole pupfish (Cyprinodon diabolis) has teetered on the brink of extinction since it made the federal list of endangered species in 1967.his poses a risk to the shrinking pupfish population, however. To reduce the impact of the egg collection, biologists should gather pupfish eggs in the fall, when the fish population is larger, rather than in the spring, according to the new study, for which a scientist analyzed the extinction risks for the pupfish.
And the lead author of the study says the 2011 study underestimated the number of Great White Sharks in the oceans - and it should not be regarded as an endangered species. A new look at research on Great White Sharks in the Eastern North Pacific Ocean indicates the population is likely growing rather than endangered.