lifes simple mysteries.
Sound requires a medium, such as air or water, to travel. Without an atmosphere, such as in outer space, there would be no molecules to transmit sound waves, so we would not hear sound in the traditional sense.
It absorbs sound so there is not an echo. Without them, the sound would bounce off the walls and would sound bad
No life would still go on without humans
because without it animals and humans would die!
Sound can help people because they are aware of there surroundings. Without sound everybody would be clueless and would not know what is going on.
Yes. Without it we would die.
Legs are important to humans because humans need to walk and legs enable them to walk. Without legs, humans would not be able to walk and therefore would be bad at being humans.
It would be just like it is, the same things would happen with or without seismologists. (just as it would with or without any other humans)
yes
Have to work by hand
That would qualify as a silent movie.
Without humans in Antarctica, there would be no scientific research as to the health of planet earth.