The answer is make you feel tired.
Endorphins are endogenous opioid neuropeptides and peptide hormones in humans and other animals. They are produced by the central nervous system and the pituitary gland. The term "endorphins" implies a pharmacological activity as opposed to a specific chemical formulation.
Answer:
space
Explanation:
they figured it out going to space and since a star is a small peice of the sun they can't touch it it's impossible without getting heat burns or dying so they ither observe a star using a telescope or went to space for days
Answer: organic
Explanation: Its melting point is -44 °C
Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles
