I held a piece of Mars today.
From the Tissint meteorite, which fell east of Tata, Morocco, on July 18th, 2011. This fragment was blasted from the surface of Mars some 700,000 years ago. Most martian meteorites have been collected in Antarctica some time after their initial fall to earth, but because the Tissint meteorite was collected soon after its collision with our planet, scientists are better able to study elements within its structure that reflect atmospheric, surface, and interior qualities of Mars. This meteorite is the first to indicate the presence of moisture on Mars, due to weathering caused by liquid found within this specimen.
tl;dr saw the first possible evidence of water on Mars and my brain exploded.