Horseshoe crabs & coelacanth fish are considered living ones of these
Quarks have six known ones of these, which is far short of Baskin-Robbins
He outlines his 3 laws of motion in "Philosophiae Naturalis Principia Mathematica"
Fusion, the change of a solid to a liquid state, is more commonly called this
The horny casing of the toes of ungulates is called this
In 1990 this space telescope provided the first picture of Charon as completely separate from Pluto
Ferrovanadium is an alloy of vanadium & this metal
Birds & bees perform this transfer of gametes from anthers to stigmas
Einstein said measurements of this depend on whether the observer is moving; it's not absolute
Most icebergs in the north Atlantic come from about 20 glaciers on this island's west coast