you have invented a time machine! you go back in time to the carboniferous period and see some medium-sized vertebrates roaming around on land eating plant material. considering the time period, these are most likely to be synapsids . you move on in time to the late permian and you happen to land on the laurasia landmass (the continents of the northern hemisphere). you are in a wet, swampy like environment. you run across some large vertebrates that look lizard-like. considering the time period and location, these are likely to be

To survive, they would have to rely primarily on fishing. They would succeed if they had access to contemporary fishing boats, strong nets, and harpoons from the Carboniferous period. It would be much more challenging if not.

The first temporal effect a time traveler would encounter is time travel. Because the day only lasted around 22 hours during the Carboniferous period, his circadian rhythm would be badly interrupted, which would have an impact on their quality of life. Insomnia, immune system dysfunction, an elevated risk of cancer, cardiac difficulties, and even an early death would result from all of the aforementioned factors put together. The increasing oxygen content of the atmosphere would also contribute to a shorter average lifespan for passengers. At the start of the Carboniferous, it was around 28%.

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