- Jun 3, 2011
- Reaction score
If you start with a fundamentally different environment from Earth (temperature, gravity, irradiation, atmospheric pressure, atmospheric composition, length of year, length of day, seasons, tides, solid phase matter, liquid phase matter, weather) any likelihood of analogous lifeforms appearing decreases with increasing differences with Earth datum.Yep, and there are countless ways of doing those things on Earth as well. They may have different chemistries but almost any alien that can get around is going to have similar analogs on Earth.Modes of locomotion depend on the environment. Different environment, different modes.
The geometry of locomotion may be similar, an alien anatomy that achieves the geometry may still be very different from what we know on Earth. Insects to birds. Ways to swim? Countless.
The laws of physics don't change though. Flight requires wings. Walking requires legs. You could go legless but then you have a snake or a slug. Swimming requires fins/wings or some form of jet propulsion. Same with sensors. RF communication would be new.