BP
before present Views: 0
Encyclopedia
byproduct
a non-saleable product of a process Views: 0
co-product
one of the many saleable products of a process Views: 1
escape velocity
velocity necessary for a body to escape pull of earth’s gravity Views: 0
Ga
billions of years Views: 0
ka
thousands of years Views: 0
Ma
millions of years Views: 2
nova
exploding star releasing moderate to high energy Views: 0
PoSTS
perspectives of society technology and science Views: 9
supernova
exploding star releasing very high energy Views: 0