"Human DNA contains 1.5 GB information."

Human DNA is tightly integrated with its environment. Instead of stand-alone, think compressed, source code of a high-level language running in an interpreter and with a standard library with 10-100x more functionality.

There's also how networks have combinational effects, some things in the body use temporal encodings, and who knows what else. We can't really estimate the information content of all of this put together since we don't even understand it. It is amazing, though.