schizophrenia, like most conditions, has been around for a very long time, perhaps most of human history. However, it wasn't formally recognized and identified as an acceptable diagnosis until 1853
14 Days
schizophreniform disorder
How was the planet Uranus been observed
Judgement based on what has been observed is a conclusion.
The Higgs boson. In fact, it has not been observed by 2011.
Some comets have tails reaching 160 million kilometers long.
"Observed" is a word that means something has been noticed.
where has some of the acid rain and forest decline been observed
Not on another planet per se. Venus and Mars have volcanoes, but none have been observed to erupt. Volcanic eruptions have been observed on Io, one of the moons of Jupiter.
calderas
It is basalt
Basalt