Max Tegmark's refutation of the Penrose-Hameroff idea is refuted.

"In artificial systems, quantum superposition and entanglement typically decay rapidly unless cryogenic temperatures are used. Could life have evolved to exploit such delicate phenomena? Certain migratory birds have the ability to sense very subtle variations in Earth’s magnetic field. Here we apply quantum information theory and the widely accepted “radical pair” model to analyze recent experimental observations of the avian compass. We find that superposition and entanglement are sustained in this living system for at least tens of microseconds, exceeding the durations achieved in the best comparable man-made molecular systems. This conclusion is starkly at variance with the view that life is too “warm and wet” for such quantum phenomena to endure."

Phys. Rev. Lett. 106, 040503 (2011) [4 pages]
Sustained Quantum Coherence and Entanglement in the Avian Compass
Abstract

Erik M. Gauger1, Elisabeth Rieper2, John J. L. Morton1,3, Simon C. Benjamin2,1,*, and Vlatko Vedral2,3,4
1Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
2Centre for Quantum Technologies, National University of Singapore, Singapore
3Clarendon Laboratory, University of Oxford, Parks Road, OX1 3PU, United Kingdom
4Department of Physics, National University of Singapore, Singapore
 Received 24 May 2010; revised 23 November 2010; published 25 January 2011

http://www.hep.upenn.edu/%7Emax/brain.pdf
Whilst all of Max Tegmark's calculations are correct, they do not ask
the correct question.
"The Question is: What is The Question?" John A. Wheeler who is
Tegmark's mentor.
Nowhere in Max's paper does he mention PW Anderson's "More is different"
except for a passing informal reference to superconductors, superfluids,
macro-quantum Bose-Einstein condensates. None of Max's useful
calculations have ODLRO in the lower order reduced density matrices
whose "phase rigidity" is an effective barrier against the thermal
decoherence mechanisms he mentions. Note that the qubits of the
alpha-beta superpositions of the electrons in the dimers should not be
considered as individual fragile quantum superpositions subject to the
decoherence calculated by Tegmark.