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Hiển thị các bài đăng có nhãn News. Hiển thị tất cả bài đăng
Thứ Năm, 25 tháng 8, 2016
Animal dissection labs are an unethical and unnecessary
21:51
Do you know interesting science facts that why animal dissection labs are an unethical and unnecessary part of the secondary school biology curriculum? Of course, it must be banned. Let's see why:
Millions of frogs are harvested every year from the wild for dissection purposes. This means that, along with all of the other ways humans are impacting frog populations, such as global climate change and pollution, humans are also destroying their populations. In the school curriculum, children are taught about the biodiversity crisis and all of its negative aspects, but at the same time, students are encouraged to contribute to it.
Many animals taken for school dissections, especially fetal pigs, are by-products of the meat industry. Almost all of the pigs slaughtered for human consumption are raised in crowded, confined conditions. Not only are their lives substantially shortened, but they are also deprived of space, fresh air, and fresh forage. The fetuses used for dissections are taken from pregnant sows at the slaughterhouse. By continuing with animal dissections, school boards are promoting the mistreatment of the animals raised for the meat industry.
It is not necessary for students to dissect animals in order to see what the insides of the animals look like. If a student were to pursue a career in a field where this is needed, they would have the opportunity to dissect human cadavers in University. However, very few students who participate in these labs in high school will actually go down these career paths. The only thing that an animal dissection lab teaches students is that an animal’s life is disposable and unimportant.
Buying animals for all biology classes can be quite costly. The cost for a high school dissection set can be over $1000.00. However, this is only a one-time purchase. Three years worth of frogs can cost about $1500.00, and for fetal pigs almost $3000.00. However, nowadays there are so many educational, interactive dissection programs that can be used instead, such as Digital Frog 2.5, V-FrogTM, DissectionWorks CatWorks, and many more (Animalearn). With the technologies and programs available in schools to aid with virtual dissections, the money spent on buying dissection sets can clearly be put to better use.
Would you like to see animal facts?
Thứ Tư, 17 tháng 8, 2016
Are penguins birds?
18:44
How amazing it is! Do you believe that there is a bird that can not fly and are warm-blooded? Yeah, penguins are bird. Let’s discover the reasons for this penguin facts :
This question arises because we often see images of these creatures swimming underwater, or waddling in an ungainly way across the icy wastes of Antarctica: penguins can’t fly and we typically associate birds with soaring through the air. However, penguins are classified as birds (Aves) in zoological terms. They are black and white flightless seabirds of the family Spheniscidae which are found in the southern hemisphere, chiefly in the Antarctic (although several species live in more temperate regions).
In common with other birds, penguins have feathers, lay eggs, and are warm-blooded. Through evolutionary processes, penguins’ wings gradually adapted to become flippers, which they use for swimming. The feathers of a penguin are relatively short and stiff in comparison to those of other birds and they overlap closely to form a thick, smooth layer which traps air beneath it and so provides insulation from the cold.
Other flightless birds include the Australian emu, the cassowary of New Guinea, and the ostrich. Unlike the penguin, they’re all more visibly ‘feathery’ as well as being land-based, so we’re probably more likely not to question the fact that they’re birds.
Because of this reason, we come to a conclusion that peguins are birds.
Would you like to see animal fun facts?
This question arises because we often see images of these creatures swimming underwater, or waddling in an ungainly way across the icy wastes of Antarctica: penguins can’t fly and we typically associate birds with soaring through the air. However, penguins are classified as birds (Aves) in zoological terms. They are black and white flightless seabirds of the family Spheniscidae which are found in the southern hemisphere, chiefly in the Antarctic (although several species live in more temperate regions).
In common with other birds, penguins have feathers, lay eggs, and are warm-blooded. Through evolutionary processes, penguins’ wings gradually adapted to become flippers, which they use for swimming. The feathers of a penguin are relatively short and stiff in comparison to those of other birds and they overlap closely to form a thick, smooth layer which traps air beneath it and so provides insulation from the cold.
Other flightless birds include the Australian emu, the cassowary of New Guinea, and the ostrich. Unlike the penguin, they’re all more visibly ‘feathery’ as well as being land-based, so we’re probably more likely not to question the fact that they’re birds.
Because of this reason, we come to a conclusion that peguins are birds.
Would you like to see animal fun facts?
Thứ Tư, 27 tháng 7, 2016
Unsweetened drinks can cause appetite
00:19
Scientists at the University of Sydney has released a new study shows that sugar-free drinks can make people eat more than the body "cravings" calorie diets were broken off.
In this study, the scientists gave fruit flies and mice a diet high in sugar substitute used, the result is that we eat more than 30% compared to normal.
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| Unsweetened drinks can cause appetite |
The type of food / drink Diet eases task calorie intake, but they did not help trigger a full reward center section (reward center) in the brain - the part responsible for feeling full and satisfied. According to the researchers, interesting science facts the brain will be "confused" when not feel the sweetness associated with calories, thereby stimulating hunger.
Research trials only sucralose, the sweetener in the drink Pepsi One, but they said that a similar effect also occurs for other artificial sweeteners such as the ingredients found in drinks Diet Coke.
Associate Professor Greg Neely, who led the study, said: "When studied in a systematic way this effect, we found that in the reward center of the brain, some interesting facts sweet feeling to be attached to the energy content . When the ratio between sweetness and power imbalance in a while, the brain will show that this diet is not enough energy to make adjustments and increase the total calories should consume ".
Currently many people use artificial sweeteners, considered as a measure to combat obesity, but they have yet to understand the full impact of these substances on the brain as well as for regulating sensation team. The team also found that artificial sweeteners stimulate hyperactivity evidence, sleeplessness, and decreased quality of sleep... read more penguins facts for kids.
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