How can aliens from a different planet move faster when they're on Earth?

What should conditions on an alien planet be like, if the aliens of said planet move 3 or 4 times slower on their home planet than they could if they were to come to Earth? (Gravity, atmosphere, etc.) For example, on their home planet, they can run 5m/s, but when on Earth, they can reach 15m/s or 20m/s.

And since I don't want them to be shorter than average humans, I plan to design the aliens to be about 3 heads taller than average humans, while still maintaining their humanoid look, with no extra limbs to accommodate the speed. Will this conflict with the desired speed?

I am working on a story in which I try to give the aliens an advantage over the humans when they arrive to Earth (through portals), since their tech is at least 300 years behind modern humans.

is a duplicate

This question has been asked before and has already been answered. It should be marked as a duplicate.

Please enter the URL of the proposed duplicate in the details field below.

not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

Communities

How can aliens from a different planet move faster when they're on Earth?

0 comment threads

0 answers