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What the statistics above show is that every planet orbits the sun and if you are standing on each of the planets, these are the number of days each planet would have in a year or for the time it would take for that planet to circle the sun. The statistics very clearly indicate that the planets farthest from the sun obviously have long years or revolutions around the sun so they logically have much more days. The planets closet to the sun have smaller years or less time to orbit the sun and so have proportionally fewer days per year. The relationship is rather obvious really, but please note the number of rotations or days specified here are what each planet would have if you lived on each planet, not increments of 24 hrs from earths perspective. If you were to sit on Mars and revolve one full revolution around the sun, you would experience 670 days, or rotations. So for Venus a year is 224 Earth days and it rotates 243 days so in a year Venus basically has one day if you sat on it.

It is therefore logical to conclude that if the Earth had 420 days then yes as you say the rotations would be faster, but this is not the only answer. When considering the evolutionary changes that have occurred on Earth with regards to species size and adaptive changes, then your planetary movement suggestion could be reconsidered. It is perhaps far more logical to consider the possibility that 420 days in a year could be recorded if the distance of the Earth was further from the sun and this also explains the evolutionary changes.

Just want to jump in to point out that Venus rotates so slowly because something flipped its axis nearly 180 degrees. This also makes its rotation a retrograde motion, which means there is serious drag on it, so the rotation is slowing down rapidly(cosmically speaking).

What could have knocked a planet almost completely over?

Speed of a planet's rotation is not directly relative to the distance from the Sun. Look at Venus' rotation. It is now known that it spins even slower than previously thought. It takes 243 days to rotate once. Much slower than Earth. So your diagram is wrong.

If you mean the ORBIT of a planet around the Sun, then yes it takes 365 days for the Earth and 670 for Mars etc...but your argument of Earth having had 420 days in a 'year' in the far past was caused by a faster ROTATION around its own axis, not a smaller 'orbit' around the Sun. You are severely mixing facts it seems.

The New Perspective is a current philosophy studying the process of life on Earth with respect to the evolutionary process and life-cycle of the planets. A pattern is recognisable through biogeographical studies that determines the physical uniqueness or unique characteristic of animals on Earth. This pattern is directly correlated to the formation of the Earths structure from head to tail. The pattern explains the regional variations of globally distributed species but is also evident in the animals that lived as recently as 10000 years ago or less - Irish deer, cave bear, saber tooth tiger, cave lion and the wooly rhinoceros ect. The same pattern is also evident through dinosaur records.

What conditions or changing conditions determine the ability for life on Earth to change in size maintaining distinctive characteristics?. It is measured that the Earth is slowing very fractionally in it's rotation and we know that rotation is relative to the distance from the sun. Ancient fossil coral, records the number of days in a year of which 420 days existed in a year an estimated 420 million years ago. Here are the number of days on each of the following planets. 420 days per year puts Earth at a position further from the sun, roughly a quarter of the distance to Mars.

Mercury  1       Venus 1        Earth  365      Mars 670       Jupiter 10504      Saturn 25292

With this changing environmental movement through the Goldilocks zone, time is also altered as a year or revolution becomes a larger value. This life-cycle movement for the planets allows scientific records to be view giving logic to this size variation through all fossil records. For extended articles explaining these newly discovered patterns and planetary movements please visit;-