A 900-year-old ‘holy well’ was discovered in London underneath the building used for Gringotts Bank in the Harry Potter films. Though it dates back to the Middle Ages, the well still contains drinkable water. Source
Einstein presented his theory of relativity in 1916, but for an entire century nobody could find physical proof of black holes. In 2016, scientists finally detected gravitational waves that emitted from 2 black holes colliding, proving that such things not only exist, but that Einstein was right all along. Source
The largest ever discovery of water is a massive reservoir that’s floating around a black hole 10 billion light-years away. The water is 140 trillion times the mass of Earth’s oceans and is older than the formation of most of the stars in the Milky Way galaxy.
99-million-year-old bird wings were
discovered perfectly preserved in amber.
It’s the first time feathers this old have
been found in such condition, making
them primary examples of hair follicles
and feather arrangements from the
Cretaceous period. Most fossil wings
are preserved in only two dimensions,
and soft tissues like feathers rarely
survive falling into amber. Source