Thursday, December 30, 2010
The type of eye commonly found in arthropods, including many insects and crustaceans. A compound eye has a mesh like appearance because it consists of hundreds or thousands of tiny lens-capped optical units called ommatidia. Each ommatidium has its own cornea, lens, and photoreceptor cells for distinguishing brightness and color. Individual ommatidia guide light through a lens and cone into a channel, known as a rhabdom, which contains light-sensitive cells. These are connected to optical nerve cells to produce the image. The ommatidia are separated from each other by varying degrees of pigment.
The ommatidia are packed side by side into bulges that create a wide field of view. As each unit is orientated in a slightly different direction, the honeycombed eye creates a mosaic image which, although poor at picking out detail, is excellent at detecting movement.
Saturday, December 18, 2010
The forest bug, Pentatoma rufipes, is a species of shield bug in the family Pentatomidae. It is a common and widespread species found in forests and woodlands worldwide. It is shiny dark brown with red-orange markings on its body and bright orange legs. It is shaped like an escutcheon-type shield, flat, and about 14 millimetres (0.55 in) long. Its distinguishing characteristic is a pair of plates extending forward from the shoulders at the front of its dorsal thorax.
The forest bug's main food source is any of several species of oak. It is a sap-feeder and uses piercing mouthparts to withdraw the liquid. It can also be found on other species of deciduous trees. The forest bug is also an agricultural and garden pest, as it will not hesitate to feed on fruit and nut trees. Occasionally it will consume other insects.
Adults lay eggs during the summer in the cracks of tree bark, and the larvae hatch the following spring.
Tuesday, November 30, 2010
The Green vine snake (Ahaetulla nasuta), is a slender green tree snake found in India, Sri Lanka, Bangladesh, Myanmar, Thailand, Cambodia and Vietnam.
The green vine snake is diurnal and mildly venomous. The reptile normally feeds on frogs and lizards using its binocular vision to hunt. They are slow moving, relying on camouflaging as a vine in foliage. The snake expands its body when disturbed to show a black and white scale marking. Also, they may open their mouth in threat display and point their head in the direction of the perceived threat.
(Thanks to Wikipedia for details)
All snakes will bite when threatened or surprised, but most will usually avoid ...
Monday, October 18, 2010
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Tuesday, August 31, 2010
Tuesday, August 24, 2010
Monday, August 16, 2010
New Discovery - Water in moon !!!
This was the headline which hit the news stand just few days back. It started off with Chandrayaan's mission to moon. Even though the mission was a failure, it brought the good news that there is scope for life in moon as there were trace of glaciers.
This discovery indeed deserves appreciation. Not only to the scientists who were toiling hard but also to each and every person who put their heart and soul to tried to make this mission a success. Hats off to each and everyone for this discovery which would bring a glimpse of good fortune to mankind whose future otherwise looks bleak what with Global warming and such.
While talking about the Global Warming we should think what we have done from our end to contribute to it.
1. Did we stop to think what are we doing to this earth?
2. Did we use less paper so that we can preserve our forests?
3. Did we stop buying new and luxurious vehicles there by contributing to environment pollution?
4. And most importantly “DID WE SAVE OUR WATER BODIES FROM POLLUTION”?
Lets’ take an example of our own garden City Bangalore. This city boasted off about having more than 280 lakes in late 60’s. Yeah..You read it right…it was 280 something lakes in and around of Bangalore.
Famous Ulsoor Lake
Among these if you could find even one now (unpolluted) ,then you should get your eyes tested .This City, otherwise Nicknamed as Silicon valley of east, the IT boom brought in jobs, then homes and then water pollution.
A small view of Bellandur Lake
Now these lakes are nothing but enhanced septic tanks. We were not able to save even one lake among this 280.
Different corner of Ulsoor Lake
Let us take another common example of our HOLY GANGA. This river’s holiness was in its ability to cure great many diseases since the river washes through the valleys of Himalayas which houses several un-discovered medicinal plants.
The holy Ganga is no more Holy…We pollute it in the name of religion. Now Ganga ‘s water does not have medicinal powers instead it carries half burned human remains and other industrial waste. Reason? Burial near Ganga is sacred and holy but polluting it is not !!!!!
Hence do you really think that we would need to contribute a Global Warming in MOON? We don’t think so.
Image of river Ganga taken from Internet
Let the discovery of water in Moon or other planets remain as a mystery as always. It would bring more harm to this universe than anything else.At least let those planets be safe from our pollution.