Pollution

Pollution is the negative effect of human activity on the natural environment.

Types of stars

This animation demonstrates the process of star development for average and massive stars.

V-1 flying bomb

The V-1 flying bomb was an early pulse-jet-powered cruise missile developed in Nazi Germany and deployed in WWII.

Northern white-breasted hedgehog

The Northern white-breasted hedgehog rolls into a ball to protect itself.

Habsburg imperial couple (19th century)

Emperor Franz Joseph I and the beautiful Elisabeth got married in Vienna in 1854, but their marriage was unfortunately an unhappy one.

سرباز ژاپنی - جنگ جهانی دوم

سربازان بسیار متعهد ژاپنی در درجه اول در قسمت آسیا و اقیانوس آرام جنگ جهانی دوم جنگیدند۔

اسلاوها

اسلاوهای مدرن در ۱۴ کشور اروپایی زندگی می کنند که می توانند در ۳ گروه طبقه بندی شوند۔

فرهنگهای بزرگ در اروپا

سازه های متشکل از قطعات بزرگ سنگی ، که قدمت آنها به هزاران سال باز می گردد ، بناهای تاریخی فرهنگ های بزرگ است۔

Waterfalls

Waterfalls form where a river flows over a steep precipice in its course.

Pula Arena (Pula, 1st century)

The Pula Arena, located in present-day Croatia, was one of the largest Roman amphitheatres in the Antiquity.

Surface tension

Surface tension is the property of a liquid that allows it to obtain the smallest surface area possible.

قلعه سيار جان هاس

در قرن پانزدهم پيروان جان هاس در استفاده از واگن های جنگی ماهر شدند۔

Hunebeds

These special dolmens located in present-day Netherlands were built about 5,000 years ago.

Edible nightshades

Many of the most important food crops we consume belong to the family of nightshades.

توپوگرافی زمین

این انیمیشن بزرگترین کوه ها ، دشت ها ، رودخانه ها ، دریاچه ها و بیابان های زمین را به نمایش می گذارد۔

Regular square pyramid

A regular square pyramid is a right pyramid with a square base and four triangular faces.

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