The daily time budgets of the rock pigeon (Columba livia) in the spring were studied basing on the example of birds with different foraging strategies. The connection between daylight hours and the birds' night sleep was ...

The main results of the International Symposium "Evolution of Permian Marine Biota," are presented. The Artinskian to Ufimian part of the section at the Kozhim River (Polar Urals) is briefly described including its ...