After a three-week expedition, the Kiel-based research ship FS POSEIDON has reached the discharge port at Heraklion, Crete, carrying preliminary results on board. Sponsored by RWE Dea, the ten-strong team of scientists and technicians under the supervision of Dr. Tomas Feseker of the Leibniz Institute of Marine Sciences (IFM-GEOMAR) explored the relations between gas genesis and mud volcanoes in the Egyptian Nile Delta.