Population ecology: Origins of genetic variability in seals. A new study shows that fluctuations in population sizes in the past have had a significant effect on contemporary seal populations, and estimates the risk of genetic impoverishment in the species investigated. Source 3r.
Engineers and biologists join forces to reveal how seals evolved to swim. Seals and sea lions are fast swimming ocean predators that use their flippers to literally fly through the water. But not all seals are the same: some swim with their front flippers while others propel themselves with their back feet. Source 3i.