Many pollutants present in our oceans are permanently contaminating marine mammals. In order to establish the extent of this exposure and the challenges it represents, a group of researchers have adopted complex and varied approaches to the problem.  

The Black Sea's habitable volume has decreased by more than 40 % in 60 years. And the oxygen penetration depth in the water column has shrunk from 140 to 90 metres, compressing a rich ecosystem. 

The observation of a high concentration of methane off the north coast has enabled scientists to take a fascinating trip back in time. The study also makes a contribution to a better understanding of the cycle of one of the most reactive greenhouse gases. 

The concentration of ethane in the atmosphere has begun increasing again since 2009. This reversal has also been accompanied by a significant surplus of methane, a well-known greenhouse gas. The exploitation of shale gas is the primary cause of this trend. 

The transit of Mercury serves as a timely reminder of the importance of this planet to an understanding of our solar system. Geologists at the University of Liege are slowly but surely shedding light on the mysteries…