https://en.wikipedia.org/wiki/No-cloning_theorem
And basically, about consciousness, what they said is true if our brain state fundamentally depends on quantum effects (which I personally don't believe, as I don't think evolution is sophisticated enough to make a quantum computer)
Well, evolution managed to make something that directly contradicts the 2nd law of thermodynamics, and creates more and more complicated structures (including living creatures as well as their creations), instead of happily dissolving in the Universe.
And this fact alone hasn't been explained yet.
The 2nd law of thermodynamics says that the total entropy of an isolated system cannot decrease. Earth is not an isolated system, it is an open one (radiating into space), and local decreases in entropy are not only allowed but expected in open systems with energy flow.
Life is no different to inorganic processes such as crystal formation (including snowflakes) or hurricanes in this regard: Organisms decrease internal entropy by exporting more entropy (heat, waste) to their surroundings. The total entropy of Earth + Sun + space still increases.
The entropy of thermal radiation was worked out by Ludwig Boltzmann in 1884. In fairness to you, I suspect most people wildly underestimate the entropy of thermal radiation into space. I mean, why would anyone, room-temperature thermal radiation isn't visible to the human eye, and we lack a sense of scale for how low-energy a single photon is.
Nevertheless, the claim that it "hasn’t been explained" is, at this point, like saying "nobody knows how magnets work".
1. Why exactly life is attempting to build complex structures? 2. Why exactly life is evolving from primitive replicative molecules to more complex structures (which molecules on themselves are very complicated?) 3. Why and how did these extremely complicated replicative molecules form at all, from much more simple structures, to begin with?
Something as simple as the game of life shows you how highly complex emergent behaviour can emerge from incredibly simple rules.
* that is, make a design (by any method including literally randomly), replicate it imperfectly m times, sort by "best" according to some fitness function (which for us is something we like, for nature it's just survival to reproductive age), pick best n, mix and match, repeat