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(rycina pochodzi z książki </span>Prof. Dr. Otto Wilhelm Thomé <i>Flora von
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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.
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<![endif]-->](/bundles/edusciencemain/images/articles/icons/Niagara_Falls_Storm.jpg){kind=icon}
Czy jest wśród Was ktoś, kto nie słyszał o wodospadzie Niagara? Wodospad ten znajduje się na granicy Kanady i Stanów Zjednoczonych. Nie jest największy na świecie, nie niesie najwięcej wody. W czym tkwi jego magia?
Skaczące ziarenka piasku na plaży – czy ktoś z Was je widział? Przeczytajcie, czym są.
