| RSS | | | Random | | | Archive |
"Atoms synthesized in the interiors of stars are commonly returned to the interstellar gas… The atoms returned are, naturally, those most readily made in the thermonuclear reactions in stellar interiors:…. All the elements of the Earth except hydrogen and some helium have been cooked by a kind of stellar alchemy billions of years ago in stars, some of which are today inconspicuous white dwarfs on the other side of the Milky Way Galaxy. The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff."
Sleep Deprivation
In science, sleep deprivation (of rodents) is used in order to study the function(s) of sleep and the biological mechanisms underlying the effects of sleep deprivation. Sleep deprivation can result in psychological symptoms resembling those of psychosis if sleep is withheld for more than 5 days.
This rat is being deprived of restful REM sleep by an animal researcher using a single platform (‘flower pot’) technique. The water is within 1 cm of the small flower pot bottom platform where the rat sits. At the onset of REM sleep, the exhausted rat would either fall into the deep water only to clamber back to its pot to avoid death from drowning or its nose would become submerged into the water shocking it back to an awakened state.