"15 Things You Didn’t Know About Earth"-3

7– Heat,

Many assume the Sun to be our main source of energy, a life-giving ball of energy to which we are utterly dependent – and that if we ever stopped receiving heat from the sun, the human race would go extinct
In reality, Earth’s core is just as hot as the surface of the Sun – between 5,000 to 7,000 degrees celcius
In the event of a catastrophe say, sun rays are permanently blocked by clouds and all land on Earth freezes, we can still harness the energy within Earth to keep us alive.

8– Exploding Lakes,

Three lakes in Cameroon, near the border of the Congo named Nyos, Monoun and Kivu – more commonly referred to as the exploding lakes
In 1984 on a small stretch of road, a gas cloud appeared and swallowed a great many local villagers walking on their way to work before getting swept away with the wind
37 people were killed instantly, and they discovered the gas cloud was in fact carbon dioxide released in an explosion from the lakes, which happened to be sitting above volcanic Earth – and continue to do so to this day.

9– Unexplored Oceans,
![mariana-trench-deep-sea-ocean.jpg]
()
Even though we’ve touched down on the Moon and conquered vast mountains, the truth is we’ve only explored little under 10% of the ocean
To this day we’ve only discovered near 210,000 underwater species with an estimated 20 million yet to be seen
That means a distant fish-human hybrid may indeed have evolved somewhere deep beneath the ocean surface, and mermaids could still be a real thing – either that, or more species of fungus.