We often come across heartbreaking photos and videos of massive whales or dolphins stranded helplessly on sandy beaches — with people rushing to help, splashing water on them, or trying to push them back into the sea. And a question arises every timePročitaj više
Voda u okeanima i morima sadrži značajnu količinu rastvorenog kiseonika. Pa ipak, ako bi čovek pokušao da diše pod vodom, preživljavanje bi bilo nemoguće.Pročitaj više
