Why Do Railways Have Signals?

It would be very dangerous if there were no traffic signals on railways. One train could crash into another head-on. Railway traffic signals are also needed because one train could crash into the back of the train in front. When there are traffic signals, we needn't worry. They tell us to stop for danger, or to go slow, or when it's safe to go fast. Just as towns and cities have their traffic signals for automobiles, the railroads have signals, and they are classified according to their use:
1. Traffic signals. These are essentially the same as the signals that are used on roads. They tell the train engineer to "Go," "Stop," "Be careful" or "Slow down."
2. Signs. These are used between workers in places where it is too noisy to hear voice signals, such as in marshalling yards. There are signs that are given by hand meaning "Go forwards," "Go backwards" or "Slow."
3. Signposts. These are posted along the railroad tracks to inform the train engineer of the condition of the roadbed or the degree of a curve or slope, or to warn him of a crossing where he must blow his whistle. Railroad signals vary from country to country.

How Does an Eagle Catch Its Food?

Eagles have sharp eyes and fly high in the sky looking for prey on the ground below. If a an eagle sees the motion of a small bird or animal it dives quickly to try to capture the victim with its sharp claws. Some eagles live near water and feed on fish. Others inhabit mountainous areas and catch small birds and animals. On the hunt, eagles ascend in a spiral pattern using up draughts and search for prey from above. Their eyesight is very keen and they are able to distinguish distant objects with a power eight times greater than that of humans. Eagles have great strength in their talons and use them to squeeze their victims to death. An eagle's sharp, hooked beak tears the flesh of its prey into small bite-sized pieces but is not used to kill or capture.

Why Do Dogs Bark at Strangers?

Long ago dogs lived in packs. If a stranger came around, one dog would bark and warn the others, and they would run the stranger off. Your dog thinks of you as one of its pack. If a stranger comes near you or your home your dog will bark to keep him away. In the animal would there is social space, a region that is like the animal's territory, and personal space, which is the small area very close to the animal. If a man or animal enters an animal's social space, the animal may just growl a warning. An example is a dog growling as strangers approach a home. If the invader then persists and enters the animal's personal space, the animal may attack the invader and attempt to drive it out. Though a dog may fight to protect its space, it will allow anyone that it knows to enter it without harm.

Shriya Saran practising yoga

Shriya Saran is one of the most sought-after heroines in Kollywood. She shot to fame after she starred in Sivaji opposite Superstar Rajinikanth. Right now, she is busy with a number of films which will release this year. Shriya will soon be seen in most-awaited film of the year Kanthaswamy opposite Vikram.She is also the heroine of Jaggubhai and Chikku-Bukku in Tamil and is hoping to strike a balance with projects in Bollywood too!The versatile actress has now turned to yoga and meditation. After recently attending a yoga workshop, the actress says it has helped her in focus and concentration. Shriya practises all the asanas that she learnt and meditation has become a part of her daily routine.

Sana Khan hoping for more films

Sana Khan entered Kollywood with Silambattam, and is now hoping for more films to come her way. She is said to be in talks with many directors, and is also looking forward to entering Tollywood.In her next project Thambikku Intha Ooru, she plays the role of a tennis player opposite Bharath. Her performance in Silambattam was appreciated, and Sana is hoping to get some challenging roles which give her scope to exhibit her acting talent.Sana said she is taking one step at a time and is in no hurry to achieve any numbers. She also said that she is thankful to Simbu for having introduced her to Tamil audiences. It may be noted that Sana Khan recently won the Best newcomer Actress award at the International Tamil Film awards held in Singapore!

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Poda Podi only after Valiban

With so many rumours flying around about whether the Simbu-Varalaxmi Sarathkumar-starrer Podi Podi has been shelved, Simbu himself finally announced that it has NOT been struck off his projects list. The movie has been put on the back burner for a while, though, as Simbu is focussed on completing Vinnathaandi Varuvaayaa with Gautham and then Valiban; only then will he move on to Poda Podi.When asked if Varalaxmi is peeved at her very first project facing such a delay, Simbu said that understandably the debutante must be upset about this, but also understands that the movie WILL happen soon and meanwhile, she could also consider other scripts.