Fringe : Season 3 : Episode 22 : “The Day We Died”
In a blitz of warfare and time travel, major characters die (or do they?), universes reconcile (or do they?) with the creation of a joint security area and Fringe events finally come to an end (or do they?). Season four of Fringe begins in September.
In the not-too distant future, ultraviolet radiation can be used to cauterise wounds. I’m not sure what benefits this would have over the more passé infrared radiation (i.e. heat), especially as it could damage DNA around the wound site.
The future Fringe team was able to analyse the carbon levels in the air around the wormhole and deduce that it went 250 million years in the past. We know what the levels of various gases in the air at that time were because we can analyse air trapped in ice sheets that were laid down then. However, I’m not sure if it works both ways – it’s entirely plausible that the air contained a certain amount of carbon (or carbon-containing gases) at several different times in the past.
If atmospheric 90Sr levels were high enough to be detected, wouldn’t the radiation monitoring networks have picked them up already? That’s how the Western world found out about the Chernobyl disaster, which the USSR had kept quiet. Maybe there had been so much upheaval on Earth-1 that the air was already full of radioisotopes.