Bees in the beehive vibrate their wings at a certain frequency. This may be an element of their communication system, suggest researchers from the University of Agriculture in Krakow, who have been spying on bees with special cameras.
Archosaur that lived 210 million years ago in the lands of today`s Poland, called Smok wawelski (the Wawel dragon), crushed the bones of its prey with its teeth. This is the conclusion from the analysis of the composition of its faeces, researchers inform in the journal Scientific Reports.
Climate changes limit the trees` access to water, scientists from the international team warn in a publication Science Advances, the main author of which is Dr. Flurin Babst from the Institute of Botany PAS in Kraków. The global study shows that the growth of tree rings was lower at the end than at the beginning of the 20th century.
Species previously not found in Europe, including fish, crayfish or squirrel, are among the most dangerous invasive alien species that can threaten the nature in Europe. Most of them come from the tropical zone, they would have little chance of survival in Poland, according to a biologist from the Institute of Nature Conservation of the Polish Academy of Sciences in Kraków.