What are the common features of time machines in science fiction?

Another function is to change the past or future. In some fictions, the time machine gives the user the power to alter events, which then has consequences on the overall timeline. It can be used to correct mistakes or, in some cases, create new problems. For example, in 'The Butterfly Effect', the main character tries to change things in the past through time - travel - like experiences, but each change has unforeseen and often negative impacts.

Gravity machines in science fiction are often used to create artificial gravity. For example, in many space - based science fiction stories, ships use gravity machines to mimic the gravitational pull of Earth. This allows the crew to move around normally as if they were on a planet. It's a crucial device for long - term space travel in these fictional universes.

In science fiction, omniscient machines often have vast knowledge. They can access all kinds of information instantly. For example, in some stories, they know every detail about the universe, from the smallest particle to the largest galaxy.

I'm not entirely sure specifically as it's not a widely known common title. It could potentially be about machines made of metal in a science - fiction setting, perhaps involving their creation, their role in a futuristic society, or their interactions with humans.

In the movie 'The Matrix', machines have taken over the world and humans are used as an energy source. This story makes people think about the relationship between humans and machines in a very extreme way.

Some well - known time machines in fiction are the TARDIS from 'Doctor Who'. It's a blue police box on the outside but huge and filled with advanced technology inside. It can travel through time and space.

They usually have colorful and appealing graphics. Also, they often have fun and engaging themes related to cartoons.

The 'Doomsday Machine' from the 'Star Trek' series is a classic example. It was a huge, automated weapon that could destroy planets and starships. It was designed to be a deterrent, but once activated, it couldn't be stopped easily. Another example is the 'Geth Colossus' in the 'Mass Effect' series. It was a massive, powerful construct that could cause significant destruction if it fell into the wrong hands or was misprogrammed.

The reason machines are considered bad in science fiction is complex. It could be that they represent the unknown and uncontrollable. Or maybe they symbolize the dehumanizing effect of technology. Another possibility is that they pose a risk to human existence and autonomy.

Often, they are shown as advanced technological devices. They are sometimes depicted as large, cylindrical structures with glowing lights and complex controls. In some science fiction, they can be miniaturized and used in personal devices.