Polecamy Artykuły Nowości
Naukowcy odkryli pierwszą egzoplanetę…
Co to jest egzoplaneta i ekostrefa?
Tales – pierwszy naukowiec
Dla starożytnych Greków zjawiska przyrodnicze miały tylko jedno wytłumaczenie – działalność bogów. Sztorm był wynikiem gniewu boga mórz – Posejdona, a dym unoszący się nad wulkanem oznaczał, że bóg ognia i kowali – Hefajstos – pracował w swym…
Dlaczego zimą nie ma na drzewach…
Skoro fotosynteza zimą nie zachodzi – liście nie są drzewom potrzebne. Ale czy drzewa naprawdę muszą je zrzucać? Czy liście nie mogłyby zostać na drzewach i po prostu nic nie robić? Otóż nie!
Trzynasty w piątek
Dla przesądnych zła wiadomość – w tym roku trzynasty w piątek wypada aż trzy razy.
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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.