Passive house

In a passive house a comfortable inner temperature can be ensured without the use of traditional heating and cooling systems.

Mitsubishi A6M Zero (Japan, 1940)

The Japanese Mitsubishi A6M, commonly known as 'Zero' to the Allies, was a legendary aircraft of the Second World War.

جاروبرقی چگونه کار می کند؟

جاروبرقی یک خلاء جزئی ایجاد می کند و به کمک هوای پرفشار وارد شده، گردوغبار را به داخل خود می کشد۔

تلویزیون لامپی چگونه کار می کند؟

این انیمیشن طرز کار یک تلویزیون لامپی را نشان می دهد۔

Deep vein thrombosis and pulmonary embolism

A blood clot that forms in the deep veins of the lower limbs can cause a fatal pulmonary embolism if they enter the lungs.

Long-tailed mayfly

Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.

The Battle of Jutland (1916)

The naval battle fought by the British Navy against the German Navy was the largest sea battle in World War I.

فیل آفریقایی

بزرگ‌ترین پستاندار زمین که در خشکی زندگی می‌کند۔

Radial engine

Radial engines are used primarily in aeroplanes and helicopters.

Hypothalamic-pituitary axis

The Hypothalamic-pituitary axis is the regulating centre of our endocrine system.


A geisha is a traditional Japanese entertainer whose skills include performing classical music and dance.

How does it work? – Tower crane

Tower cranes are machines used for lifting loads weighing up to several tonnes.

The Zuiderzee Works and the Delta Works (Netherlands)

Remarkable civil engineering works to continue the Netherland's centuries-long fight against the sea.


A type of prehistoric reptile having bony plates on its back, which aided thermoregulation.

How does it work? - Optical disc drives

This animation demonstrates the structure and operation of different types of optical disc drives.

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