Volcanoes are amazing: explosions, rocks flying up high, lava rivers flowing down the slopes, clouds of ash filling the air. There're about 1,500 potentially active volcanoes on Earth and we're already watching 19 of them closely. They might explode awake any minute... Like the volcano in Iceland that suddenly woke up after 800 years!

On July 20, 1969, Neil Armstrong stepped onto the lunar soil, saying, "That's one small step for a man, one giant leap for mankind." Since the Moon doesn't have any wind or rain, the footprints should still be relatively untouched. NASA put in a lot of effort to make sure these footprints stay protected, as well as the location of the initial Moon landing. There are many flags on the surface of the Moon, too. But the flags left there are most likely discolored now because of the exposure to strong solar radiation.

If you look up at the Earth's satellite, the Moon, you'll see that its surface is peppered with thousands of craters. Those are caused by asteroids and meteorites colliding with the lunar surface. But it also has over 200 holes that might even lead to caves. Scientists from around the world keep an eye on them and wondering if they may lead to an underground tunnel system...

Is it possible to permanently settle on the Moon? Yup, but we'd need more advanced equipment, infrastructure and astronauts' outfits. Current spacesuits are great for walking on the Moon but aren't enough for permanent missions. Human body can perfectly function on Earth, but the Moon has different atmosphere and magnetic field. Let's see which upgrades a new spacesuit should definitely have.

How many Moons does our planet have? Sounds like a pretty straight-forward question, doesn't it? The simple answer is that Earth has only one Moon, which we see in the sky every night. The more complex answer is that the number of moons varies over time... How is it possible? In this video I'm gonna explain this to you. By the way, around the Solar System, multiple moons are the rule. Mars has two moons, while Jupiter has over 60 natural satellites. More coolest space facts are coming your way... We'll explore why planets don't twinkle, while stars do. Also, we'll talk abouit space volcanoes: they can spew methane or ice instead of lava. Let's find out more coolest facts about the processes happening in space. #brightside