An extra day is added to the end of February every 4 years owing to the earth’s revolution that takes 365.2422 days to complete an orbit around the sun, that adds up to a full day every 4th year.
Olympus Mons on Mars is tallest mountain on any of the planets of the solar system standing at 26 km height(almost 3 times of Mt. Everest) and sprawling 600 km across.
There could be an infinite number of universes (#multiverse) as speculated by several branches of mathematics, quantum mechanics and astrophysics.
Universe was infinitely hot at its birth and would die with a ‘BIG FREEZE’, as predicted by Scientists.
The most complex object in the Universe is ‘Human Brain’, the organic super computer with hundred billions of neurons and a quadrillion connections.
The remarkable fact for the age of Universe to be 13.7 billion years is known with less than 1% precision, as confirmed by certain radioactive nuclei.
The red color of mars is due to the presence of rusted (oxidized) iron in its soil.
Einstein theory of general relativity shows that gravity not only pulls on matter, but also space and even ‘Time’ itself!
Saturn consist almost entirely of gas, mostly Hydrogen and Helium. Besides its small rocky core, there is no solid at all.
Gravity on moon is 17% of that of earth’s, that allows Astronauts(wearing space suits) to jump 4 meter high on moon.
There you have it. Feel free to come up with a longer list of your own.