Polecamy Artykuły Nowości
Mistrzowie morskiego kamuflażu
Morskie zwierzęta często stosują różne sztuczki, żeby ukryć się przed drapieżnikami, ale same drapieżniki również świetnie się kamuflują.
Świetlne spektakle nad polarnym…
Co to są zorze polarne, jak powstają, jaki związek mają z polem magnetycznym Ziemi? Co do tego wszystkiego mają pająki i parasole? Zastanówmy się nad tym właśnie teraz, kiedy zorze polarne rozświecają niebo nad Polską Stacją Polarną na Spitsbergenie,…
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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.
Sekretarz – piękny ptak czy dziw…
W świecie zwierząt przystosowanie do warunków życia często manifestuje się niezwykłym wyglądem, z którego możemy odczytywać, jak przebiegała ewolucja cech ułatwiających przetrwanie w środowisku.
Wstrząsy górnicze
Trzęsienia ziemi w Polsce? Naturalnie!