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> Birds today share same genes as tyrannosaur rex

Really? Surely this claim would require the sequencing of the T-Rex genome, which I'm guessing is an impossibility.

Maybe not so impossible? https://www.nsf.gov/news/news_summ.jsp?cntn_id=111466

Strictly speaking, all liveforms on the planet share same genes because they descended from a common ancestor. You probably have 50% of common genes with plants and quite a few with microorganisms.

IIRC, ~70% with bananas.

it sounds like quite a stretch to say everything shares the same genes. A lot of the genes have come into existence long after distant species split apart, and other genes have disappeared from one specie while continuing in others.

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