system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Did Thanos, Odin and other powerful beings having advanced cosmic technologies know, that to travel comfortably through time they just need to reverse engineer Pym Particles and create technology to properly use them?
gpt
Clearly Thanos didn't, because he couldn't without getting the particles from Nebula. 

 Since Freya was not surprised by Thor's appearance earlier in his own timeline, Asgard must have something that allows time travel. Although not shown in the MCU, OdinForce itself had that ability. They may not have required Pym particles to accomplish it.