Before and after the 1980 eruption of Mount St. Helens (Washington State, US)

The effect of ecstasy on serotonin receptors in your brain. Ecstasy also known as MDMA completely damages serotonin receptors.
Image courtesy of Dr. GC Ricaurte of Johns Hopkins University School of Medicine
Don’t do drugs kids!
This is the first topographical map of Saturn’s largest moon, Titan. With a radius of nearly 1,600 miles, the moon is bigger than Mercury and
is the second largest moon in the solar system. Furthermore, it’s the
only moon in the solar system to boast clouds, surface liquids and a
mysterious, thick atmosphere composed of nitrogen like Earth’s. However,
the organic compound methane on Titan acts the way water vapor does on
Earth, even forming clouds and falling as rain and carving the surface
with rivers.
(Source)