7. describe one shark from the cenozoic era. what does the shark look like ?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success

All organisms contribute some water to the water cycle by conducting