Paddle steamers, suitable for freight and passenger transportation, played an important role in US history.
This 3D scene presents the scientific work of Robert Hooke and Antonie van Leeuwenhoek, focusing on the role the microscope played in their scientific activities.
The Mars rover Perseverance and the helicopter Ingenuity conduct scientific research on Mars.
Food chains represent the feeding relationships in an ecosystem.
Divers are supplied with special equipment that helps them breathe and swim underwater.
Dive to the bottom of the Pacific Ocean and learn about the legendary voyage and the participants.
A game to practise the use of analogue and digital clocks.
The castor bean tick is a parasite that feeds on the blood of most mammals, including humans, and transmits several diseases, including the Lyme disease.
Raudonuosiuose kraujo kūneliuose (eritrocituose) esantis baltymas, pernešantis deguonį.
Skruzdžių rūgštis, paprasčiausia karboksirūgštis.
Balta, saldi, tirpi vandenyje medžiaga, žinoma, kaip cukrus.
Medžiaga, iš kurios sudarytos augalų ląstelių sienelės ir pluoštai.
Balta, kieta medžiaga, kuri įeina į augalinių ir gyvūninių riebalų sudėtį.
Viena iš anglies alotropinių atmainų, kuri atrasta 1980 metų pabaigoje.
Polinukleotidas, sudarytas iš fosforo rūgšties liekanos, ribozės ir azotinių bazių (citozino, uracilo, adenino ir guanino).
Viena iš deguoninių azoto rūgščių. Bespalvė, aštraus kvapo medžiaga, stiprus oksidatorius.
Bespalvis, bekvapis skystis, gaunamas anglies dioksidą ištirpinus vandenyje.
Entertaining and spectacular animation to practise orientation in space.
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
Neurons are cells specialised for transmitting electric signals.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
The urinary system serves for the removal of harmful and useless materials from the body.
The German engineer Otto Lilienthal was the first person to make successful flights with a glider designed by himself.