What If All The Planets In The Solar System Were Combined Into One

Venus has temperatures of nearly 900 degrees Fahrenheit (480 degrees Celsius), scientists believe that the lands here are flat because of the extreme temperatures, but it's not all flat with some volcanoes and highland areas. We can probably find this terrain and climate near the Equator since it's always hot there. Humans can't live there unless they build special domes to sustain life. But since the planet is now huge, not all its territory needs to be populated, some areas will have the proper atmosphere for breathing; but some places might not have such luxuries.

Over at the poles, the climate will most likely mimic Pluto's, even though it's not technically a planet anymore. In 2006, they officially declared it a dwarf planet and it's even smaller than the moon. There's not much known about this little mini floating rock, except that it's composed of around 70% rock and 30% ice. Scientists believe that a part of its surface is covered in frozen nitrogen, solid methane and carbon dioxide.

Since the mega planet is huge, gravity might be quite strong here. Jupiter's gravity is enough to double your weight, humans will most likely be really tall and mega-sized to match the big planet. Even the oceans will be huge, our oceans will look like little lakes compared to what Mega-Earth has in store for us.

Humans need something close to 24 hours in a single day, our bodies adjusted to it quite well, but it wouldn't affect us too much if the day had a few extra hours or a few hours less. We can't live on any other planet without wearing the proper gear, we wouldn't last more than a few seconds in places like Jupiter, Neptune and Saturn. It's possible to last as long as you can hold your breath on Mars, the atmosphere is thin and the gravity is similar to ours, but you might freeze. Even though it's a red planet, it's actually very cold and has ice caps in the poles covered with carbon dioxide. The same is true for Mercury, you can only last there as long as you can hold your breath and be in the sweet spot between the sunrise and the sunset.

Ancient civilisation would not have been as diverse as they were on Earth, since the extreme terrains and conditions wouldn't have allowed for discovery and training, but eventually, as humans developed special technologies for certain areas, different cultures would emerge. Many animals would also evolve in specific and unique ways, but because of the planet's enormous size, isolation and being on top of the food chain would let certain animals be around since the beginning of the planet without evolving. So it's possible that this Mega-Earth might have ancient dinosaurs roaming around and they'd be even bigger than the ones on earth.

Even though there's a high chance that some humans might be physically different than each other, there might even be more than one species of humans living on opposite ends of the planet. Because of the isolation, they evolved in their own ways according to their surroundings. Over the centuries, technological advancements would spread different cultures around and we'd be more open to each other.