great grandaddy bur oak
great grandaddy bur oak
Dendrologists: [heavy breathing]
In all seriousness, isn’t it pretty unlikely that alien life could interbreed with terran life even if they also used DNA with the same bases?
Scientist 1: “How are things coming along with our test subjects?”
Scientist 2: “I don’t know, it’s about time to check back in with them.”
Scientist 2: “Hey, Mike? How’s it going?”
Mike: “Not too bad. There have been some challenges, but I think we got a few things worked out.”
Scientist 2: “Oh…my. was that it’s–”
Mike: “No, I don’t think so, but it seems like it was mutually enjoyable, though, so write that down.”
[Trilling noises in the background]
sighs in overwhelming redundancy
Actually I loved that haha

Wow. So I went looking if people actually knew when our codon system appeared.
Turns out that there are 26 slightly different systems on Earth right now, and there are good reasons to expect random alien life to have a system that looks like ours, but is different enough to not be compatible.