21/02/2020
Flowering plants have much smaller genomes than ferns, conifers and other types of vegetation — and that could be why they make up more than 90 percent of all land plant species. Their compact DNA allowed flowering plants to have smaller cells, which in turn let them become highly efficient at photosynthesis.
https://www.quantamagazine.org/with-downsized-dna-flowering-plants-took-over-the-world-20180111
26/11/2019
Remembering the man who discovered how nerve impulses are exchanged between cells,
Huxley
The nervous system in people and animals consists of many different cells. In cells, signals are conveyed by small electrical currents and by chemical substances. By measuring changes in electrical charges in a very large nerve fiber from a species of octopus, Huxley together with Alan Hodgkin were able to show how nerve impulses are exchanged between cells.
In 1952 they could demonstrate that a fundamental mechanism involves the passage of sodium and potassium ions in opposite directions in and out through the cell wall, which gives rise to electrical charges.
Huxley and Hodgkin were awarded the 1963 Nobel Prize in Physiology or Medicine for their discovery.
25/10/2019
Spallanzani showed that some animals, especially newts, can regenerate some parts of their body if injured or surgically removed.
Spallanzani researched in 1768 the theory of the spontaneous generation of microbes. At the time, the microscope was already available to researchers, and using it, the proponents of the theory, Buffon and Needham, came to the conclusion that there is a life-generating force inherent to certain kinds of inorganic matter that causes living microbes to create themselves if given sufficient time. Spallanzani's experiment showed that it is not an inherent feature of matter, and that it can be destroyed by an hour of boiling. As the microbes did not re-appear as long as the material was hermetically sealed, he proposed that microbes move through the air and that they could be killed through boiling.
19/10/2019
The first green rose we met was born from a mutation of Rosa chinensis (the rose bush of China) at the end of the 17th century. It was introduced to the European market in 1856 by the British nurseries Bembridge and Harrison.
The flowers of this rose are very particular, with a perianto formed by many sepals of light green toothed green leaves, replacing the missing petals. These sepals of color acquire a brown hue over time.
The size of green roses is medium, about 5 cm in diameter, and they are usually grouped in clusters. Flowering is climbing and lasts until the first frosts. The rose bush is an erect shrub one meter tall and long, bright bright green foliage, with traces of red on its leaves
14/08/2019
Crookes was the inventor of the Crookes radiometer,He used this pump to withdraw air from sealed glass tubes. Crookes observed that the negative electrode (the cathode) gave off a stream of charged particles. He discovered the element Thallium, and developed a chemical process for separating gold and silver from their ores.
09/08/2019
They are able to conserve energy by reducing their metabolism to approximately 1 / 15th of normal speed. During a normal period of time your heart will beat more than 1,200 times per minute, hummingbird wings can move up to 80 times per second. When is trying to impress a female, the beating of its wings can increase up to 200 times per second.The nature is great!😍
08/08/2019
The panda ant is a species of hymenoptera insect of the Mutillidae family. Its head has white hairs, and the rest of its body is black and white. The appearance resembles that of the panda and hence its name
03/08/2019
It reappeared !!!! In Taiwan they discover a species of leopard called "cloudy leopard" that was «extinct» 😁
02/08/2019
that's what a skeleton of a hedgehog looks like😮
02/08/2019
is a spiny nocturnal mammal that hunt at nigh time . it feed on snakes ,scorpions and other insects like Moth etc . when The snake and scorpion bite it the venom donot affect on it because it is immunized against its venom.