There are two methods. The most common form is observation, since most species have what science calls sexual dimorphism – that is, distinct physical characteristics between males and females. This occurs in animals from different families and orders, such as…
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What a disgusting question, right? But, as disgusting as they are, phlegm and nose snot are nothing more than a mixture of proteins and water with cell debris. Ear wax, in addition to proteins and water, also has some enzymes…
Data sheet sucking loaches German name: sucking loaches Scientific name: Gyrinocheilus aymonieri Origin: South East Asia Size: Body length up to 30 cm Aquarium Length: Length from 120 cm width Contents: from 240 liters water values Temperature: 22°-28° C pH:…
It is not known exactly which people used this sign for the first time, but it is certain that it has a very ancient origin, at least 5 thousand years old. The word itself comes from the Sanskrit svastika, which…
Thermometers that are attached to the outside of the aquarium pane are often sold as digital thermometers. These are specially coated plastic strips that change color depending on the temperature. The display accuracy is usually 1°C. Thermometers attached to the…
Basically, it was the US Department of Defense.The computer network emerged in the late 1960s, during the Cold War, while the North Americans and the Soviet Union were engaged in a fierce technological dispute. The project, conceived by the Advanced…
Data sheet Kaiser cichlid German name: Emperor cichlid Scientific name: Aulonocara nyassae Origin: East Africa, Lake Malawi Size: Up to 15cm Aquarium Requirements: Length 120 cm / width 40 cm / content: 400 liters water values Temperature: 25°C to 27°C…
ILLUSTRATIONS Lucas Leibholtz 10) WANG JINGWEI Birthplace China time of betrayal Sino-Japanese War, 1930s After participating in the Kuomintang, a movement that struggled to unify the country, Jingwei revolted and switched to the enemy side just as China’s war against…
Sandos, Two adult Guinea Pigs (Cavia porcellus), CC BY-SA 3.0 Healthy diet for guinea pigs Hay as forage In nature, guinea pigs feed on grass, herbs, leaves and other plants. They are pure vegetarians, which means they do not eat…