# 3 Simple Ways to Time Travel (& 3 Complicated Ones) | Summary and Q&A

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October 26, 2013
by
minutephysics
3 Simple Ways to Time Travel (& 3 Complicated Ones)

## TL;DR

Time travel can be achieved by moving through spacetime relative to others or by creating time loops or wormholes.

## Key Insights

• ⌛ Traveling through time is a natural progression, as we are constantly moving forward in time.
• 🙂 Movement relative to someone standing still can result in a slight difference in age due to time dilation.
• 💪 Gravity affects the passage of time, making it slower in stronger gravitational fields.
• ⌛ The curvature of the universe caused by fast-spinning would create time loops, allowing for time travel.
• 🏛️ Building an infinitely long spinning cylinder could potentially create a time-loop, but it is currently unfeasible due to its infinite size requirement.
• 🏗️ Wormholes, if built, could serve as shortcuts in spacetime, enabling time travel. However, the construction and stability of wormholes remain unknown.
• 🤗 Negative energy is theorized to be necessary to keep wormholes open, but its creation is not yet understood.

## Transcript

Time travel can be complicated - and complicating, so let's ignore all the paradoxical stuff and talk about a few simple ways that you can time travel without leaving your home. First, 1) Do nothing - you're already traveling through time! I mean, here you are - fifteen seconds into the future since the start of this video! Easy, huh? The point is,... Read More

### Q: How can we time travel without leaving our home?

Simply by staying in one place, we are already traveling forward in time. However, to experience time travel relative to others, we can move or stand up to affect the passage of time.

### Q: How does movement affect time travel?

Moving relative to someone standing still can cause a slight difference in age due to the slower passage of time. This phenomenon is known as time dilation.

### Q: How does gravity impact time travel?

Gravity influences the passage of time, and being in a stronger gravitational field slows down time. By standing up and being further from the Earth, we can experience time travel relative to someone sitting down.

### Q: Are there more advanced methods of time travel?

Yes, more complex methods include the concept of time loops, where traveling along a loop brings you back to a past time. Additionally, wormholes, hypothetical bridges in spacetime, could potentially allow for time travel, although they are yet to be built and require unknown techniques to keep them stable.

## Summary & Key Takeaways

• Doing nothing already counts as time travel since we are constantly moving forward in time.

• Moving relative to someone standing still can result in a tiny age difference due to the slower passage of time.

• Gravity affects the passage of time, so being further from the Earth can make time slow down.