Polecamy Artykuły Nowości
Bocian biały – desperat czy stra…
W roku 2013 zima była wyjątkowo długa i sprawiła nie lada problem bocianom, które, jak każdej wiosny, wracały do Polski, żeby tu wychować swoje potomstwo.
Szczęśliwego 31²+27²+17²+6² roku…
W tytule występuje oczywiście liczba 2015, przedstawiona w postaci sumy czterech kwadratów liczb całkowitych. Matematycy często dla zabawy używają tego rodzaju przedstawień, składając życzenia noworoczne lub urodzinowe.
„Kwadratowe koło”
Czy próbowałeś/aś jeździć na rowerze z „kwadratowymi kołami”? Raczej nie
Iść czy biec? Oto jest pytanie!
Czy zastanawialiście się kiedyś, dlaczego małe dzieci zwykle biegną lub podskakują, idąc z rodzicami? Albo dlaczego gdy się śpieszymy przy przejściu z punktu A do punktu B, to czasem idziemy szybko, a czasem podbiegamy?
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inter-ideograph"><span style="mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman"">Rycina przedstawiająca pokrzywę
zwyczajną </span><a href="http://pl.wikipedia.org/wiki/Plik:Illustration_Urtica_dioica0_clean.jpg"><span style="mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman"">http://pl.wikipedia.org/wiki/Plik:Illustration_Urtica_dioica0_clean.jpg</span></a><span style="mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman"">
(rycina pochodzi z książki </span>Prof. Dr. Otto Wilhelm Thomé <i>Flora von
Deutschland, Österreich und der Schweiz</i> 1885, Gera, Germany)<span style="mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman""></span></p>
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Zapomniane oblicze pokrzywy
Pokrzywa zwyczajna (Urtica dioica L.) to jedna z tych roślin, którą poznajemy już we wczesnym wieku i to najczęściej od tej nieprzyjemniej strony. Swędzenie, zaczerwienienie, wysypka to częste efekty spotkania z pokrzywą.