BP
before present Views: 3
Encyclopedia
byproduct
a non-saleable product of a process Views: 2
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: 1
Ga
billions of years Views: 2
ka
thousands of years Views: 2
Ma
millions of years Views: 4
nova
exploding star releasing moderate to high energy Views: 2
PoSTS
perspectives of society technology and science Views: 11
supernova
exploding star releasing very high energy Views: 3