In recent decades, the Baltic Sea has begun to recover, but still contains unfavourable phenomena. Anaerobic deserts are growing, cyanobacterial blooms are intensifying, and underwater engineering works raise toxins from the bottom, which eventually end up in the food chain, says Dr. Lech Kotwicki from the Polish Academy of Sciences.
In the 5th century, the fundamental demographic processes shaping the genetic structure of the 10th-12th century population living in the area of contemporary Poland had ended. No additional migration after the 5th century in Central Europe (CE) was necessary for the formation of the genetic structure of the inhabitants of the Piast State, shows the research of scientists led by Professor Marek Figlerowicz.
Over the centuries, humans have deprived animals of large areas of their natural habitats. However, some of them have adapted perfectly to the new conditions they find in urban agglomerations, says the head of Department of Vertebrate Ecology and Zoology of the University of Gdańsk, Professor Włodzimierz Meissner.
'We need to free our cities of concrete, because it will soon become unbearable,’ says Professor Tomasz Jurczak from the University of Lodz. According to ecohydrologists, this is the last moment to change our way of thinking about water and greenery in cities as critical infrastructure.
Inside human cells, the helical DNA strand twists further and is completely different from the familiar double helix. At very small scales, the behaviour of DNA is determined by elastic forces. Scientists show how to study the elastic properties of DNA using hydrodynamic measurements. Discovering the shapes of DNA mini-circles was described by an international research team with the participation of Polish scientists.
Bees evolved from carnivorous ancestors. In the course of evolution, they had to adapt to a plant-based diet. The problem is that the nectar and pollen that make up their food have such a high of potassium to sodium ratio (K:Na) that it can negatively affect the development and health of bees. Polish researchers analysed the consequences of the situation.