The Doctor finishes up putting his clothes on; "Rasslion twisted our genetics in various ways." Tecteun too but The Doctor didn't want to open that can of worms up and possibility being found outside a wormhole.
"Only the Daleks rival us in cleverness. And yes, they figured out time travel; I'm not sure how wouldn't surprised me if they reversed engineered a Tardis."

There is a pause, "We're impossible. We can regenerate. We're immune to vampires. Next to impossible to get sick from disease. We're high telepathics. We can handle long falls. We adapt in the next life."