Time Bomb

 I just had a thought. A terrible one.

If you had just a little of time travel, then you could make a nuclear weapon with nearly perfect yield. This works even if electromagnetic radiation cannot travel backward in time.

If you could make all of neutrons emitted by the core so that they are conditioned, and then traverse the nucleus before the fission started, you could make every single fissionable atom to fission at nearly the same time. This is interesting because the majority of the yield is said to come from the last few "flicks' in the core.

Even materials considered very unsuitable for weaponization could be made into a functioning nuke. It would get a comparatively effective "infinite neutron flux" across the core.

Straandbeest pony

 A child wildly walking a pony can make it move forwards and backwards. I think there is a version of that that has strand beast legs and actually walks.

Here is a hemi-straandbeest bicycle:

https://m.youtube.com/watch?v=fXXJ1LOqHEk

Here is the mechanism for it:

https://m.youtube.com/watch?v=FFS-2axFo1Y

accosting microglider

 White sands guys balanced aluminum discs at 5000ft with a laser.  

I bet a similar glider could be made at the size of a grain of salt using acoustics.