»> The first surfaces capable of reflecting images began to be made around 5,000 years ago in ancient Sumeria – a region in present-day Iraq, encompassing areas close to the city of Baghdad. Mirrors of that time did not produce…
German name: Swamp Hayweed Scientific name: Ludwigia palustris Attitude: easy, suitable for beginners Size: up to 50 cm Temperature: 4 to 28°C pH: 5 – 8 GH: soft – hard° dGH CH: 2 to 22 °dKH propagation: cuttings, stolons Aquarium:…
– (Érika Onodera/) The image above illustrates a twisted and a normal testicle. Torsion happens when a tube called the spermatic cord, which connects the testicles to the abdomen, accidentally rotates and «twists». Through this cord pass veins, nerves, lymphatic…
Datasheet Arowana German name: Arowana Scientific name: Osteoglossum bicirrhosum Origin: Area of the Amazon, Araguaia and Rupununi in southern Guyana and in the border area between Brazil and French Guiana Size: Body length 90 to 120 cm Aquarium Length: Length…
It may seem obvious, but it’s the simple truth: planets rotate because there is no force to stop them. The fact is that everything tends to maintain its movement if nothing appears to oppose it. This story began with the…
Data sheet for the brilliant tetra: German name: brilliant tetra Origin: South America: Venezuela Size: 6 cm Aquarium Length: 80 cm Contents: From 112 liters Lighting: Shady Furnishings: Plants and free swimming space water values Temperature: 24-28ºC PH value: 5.5…
Until the eleventh century, almost everyone ate with their hands. The most educated were those who used only three fingers to bring food to their mouths. In that century, Domenico Salvo, a member of the court of Venice, married Princess…
Data sheet three-line armored catfish German name: Three-lined armored catfish Scientific name: Corydoras trilineatus Origin: South America Size: Body length 5cm – 6cm Aquarium Length: Length from 80 cm width and from 40 cm width Contents: from 100 liters water…
HOW IS THE SEX? PrehistoryAntiquity | Modern Age | Today | In the future Prehistoric men already distinguished sex from reproduction, used natural cosmetics to increase flirting, had sex in very different positions than daddy-and-mommy and even used contraceptive methods.…
Throttle the internal filter in the aquarium Internal filters whose performance cannot be adjusted can be throttled in various ways. reducing the amount of water The flow is often only large when the filter is clean. Over time, the filter…