The number of sharks in the Mediterranean has fallen by 97 percent in the last 200 years, putting the sea’s ecological balance at risk, a report released on Wednesday said.
The report, by the Washington-based Lenfest Ocean Program, used records such as fishermen’s logs, shark landings, museum specimens and visual sightings to estimate the number and […]

The study used a lab-based artificial ecosystem of communities of bacteria to examine what happens when the bacteria move around and evolve to live in different parts of the ecosystem over the course of hundreds of generations. The scientists measured the effect this dispersal of species has on the productivity and biodiversity of the ecosystem […]