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new species have been discovered at hydrothermal vents



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new species have been discovered at hydrothermal vents.
Active hydrothermal vents are believed to exist on Jupiter's moon Europa, and ancient hy- drothermal vents have been speculated to exist on Mars" -- Reference Wikipedia.org back to 146)
147 "... asteroid belt"
"The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor plarnets. The asteroid belt region is also termed the main belt to distinguish it from other concentrations of minor planets within the Solar System, such as the
Kuiper belt and scattered disk.
248

More than half the mass within the main belt is contained in the four largest objects: Ceres, 4 Vesta, 2 Pallas, and 10 Hygiea. All of these have mean diameters of more than
400 km, while Ceres, the main belt's only dwarf planet, is about 950 km in diameter. The remaining bodies range down to the size of a dust particle. The asteroid material is sob bthinly distributed that multiple unmanned spacecraft have traversed it without inci-
dent." -- Reference Wikipedia.org back to 147)

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