Wednesday, February 25, 2009
A gazelle (Arabic: غزال transliteration: ġazāl) is an antelope currently or formerly in the genus Gazella. Two additional genera, Eudorcas and Nanger, now include six species of gazelles that used to be considered members of the genus Gazella, when Eudorcas and Nanger were considered subgenera. Likewise, the genus Procapra has been considered a subgenus of Gazella, and its members are also referred to as gazelles, but they are not treated in this article.
Gazelles are known as swift animals; they are able to reach high speeds (as high as 50 Miles per hour or 80 km/h[1]) for long periods of time. Gazelles are mostly found in the deserts, grasslands and savannas of Africa, but they are also found in southwest and central Asia, and the Indian Subcontinent. They tend to live in herds and will eat less coarse, easily digestible plants and leaves.
The gazelle species are classified as part of the order Artiodactyla, family Bovidae and genera Gazella, Eudorcas and Nager. Members of the Artiodactyla order are principally distinguished by the foot; they have an even number of toes (the bovid family comprises 6 genera and 12 species). The taxonomy of these genera is a confused one, and the classification of species and subspecies has been an unsettled issue. Three species—the Red Gazelle, the Arabian Gazelle, and the Queen of Sheba's Gazelle—are extinct. Most other gazelle species are considered threatened, to varying degrees.
A recognizable example of the gazelle is Thomson's Gazelle (Eudorcas thomsonii), which is around 60 to 90 cm (23 to 35 inches) in height at the shoulder and is coloured brown and white with a distinguishing black stripe (as in the picture on the right). The males have long, often curved, horns. Tommies, as they are familiarly called, exhibit a distinctive behaviour of stotting (running slowly and jumping high before fleeing) when they are threatened by predators such as lions or cheetahs. This is a primary piece of evidence for the handicap principle advanced by Amotz Zahavi in the study of animal communication and behaviour.
Tuesday, January 27, 2009
http://www.youtube.com/watch?v=nPtAsm_9S3w
I'm currently working on something so I won't really be posting anything in the next few days. Things I'll include: people who influenced me - Joel Jason Gregory glenn lance jun chong hong xiang marcus nathan Anglican high people Sjab ambulances Sjab people ... and many more ...
Thursday, January 22, 2009
Happy Chinese New Year to all HO HO HO HO!!!
Wednesday, January 21, 2009
From the kids view : Wow a nitrogen gun!!! Freezes things and cool!! Teach me how this is made! I want one!! First: get a filter paper 2) go to your nearest swimming pool and use the filter paper to collect chlorine 3)Add mustard to the chlorine and then pour it into a thermo gun- made from thermo flask ten.. add a trigger for shooting then shoot! :) Once i shot at the ceiling directly above my bed.. immediately icicles formed ..that night i had extra heat taken away giving the room a freezy sensation...(ok that was almost what i was told in primary 6 which gave me a great amount of interest in science ...) Another thing was the laser gun ... It is made with a laser pointer inserted into a homemade glass gun made over a bunsen burner.. the laser hits the glass at an angle greater than the critical angle causing total internal reflection and after a few reflections, it goes through the barrel and.. is shot out it can cut through light leather and other thin materials... (of course it doesn't work) But it gave me interest in science.. thanks to Timothy teo shen jie :)
Hello friends and .. readers this is my third blog i have made after two others.. I will try my best to update it and make it interesting. Have fun reading! - Jonathan Lee SGT: 7.30PM