About the Authors

Nicole Blaser

nicole.blaser@anatom.uzh.ch

Affiliation Institute of Anatomy, University of Zurich, Zurich, Switzerland

Sergei I. Guskov

Affiliation Ukrainian Geological Institute, Kiev, Ukraine

Virginia Meskenaite

Affiliation Institute of Anatomy, University of Zurich, Zurich, Switzerland

Valerii A. Kanevskyi

Affiliation High-Technologies Institute, Kiev, Ukraine

Hans-Peter Lipp

Affiliation Institute of Anatomy, University of Zurich, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HPL VK. Performed the experiments: NB. Analyzed the data: NB SG HPL. Wrote the paper: NB HPL. Provided geophysical maps: SG. Training of pigeons and revision of the manuscript: VM.