Plant extinct in Poland for 60 years has reappeared
A species of green algae critically threatened with extinction in Europe - a Chara plant called Nitella translucens, which had not been found in Poland for about 60 years, was found in Lake Jeleń in the Pomeranian province, determined scientists from Poznań.
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Heroic ants - the longer they live, the more willing they are to rescue their companions
The longer the workers of a given species of ants live, the greater their tendency to rescue companions in need, Polish scientists have proven. Their results may be important for understanding social behaviours, especially those described as altruistic.
