Today the topic is about tiger
There are 5 different types of tigers in the world.
1. Siberian Tiger: Siberian tigers are very muscular they have large head.

2. Bengal Tiger: Bengal tigers can be found in Bangladesh , Bhutan, India and Nepal. They are only 2500 adult tiger population are remaining. they are highly engendered.

3. Indochinese tiger: They can only found in many Asian countries, such as Burma, Cambodia, Laos, China, Vietnam and Thailand. They have more darker color but smaller in size than Bengal

tiger.













4.

Malayan Tiger: They can be found in south of Malayan Peninsula. they are about five hundred still living.










5. South China Tiger: The south China tiger is the most engendered tiger. They are even more engendered than others.

Today Fahmia did somr research about Turtle:
Her interesting findings are

1. Turtles are existing for about 215 million years
2. Most turtles hide in their shell when attacked by predictors
3. All turtles have a hard shell that protects their body like a shield. their upper shell called carapace.They also have a lower shell that is called a plastron.

4.  Like all other reptiles, turtles are cold blooded
5. because turtles are reptiles, they lay egg

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Will go in a different direction:
Creation of universe and how things came in last 13.7b years:

Newtons law of Gravity

ALL objects attract each other with a force of gravitational attraction. Gravity is universal. This force of gravitational attraction is directly dependent upon the masses of both objects and inversely proportional to the square of the distance that separates their centers. 
Knowing the value of G allows us to calculate the force of gravitational attraction between any two objects of known mass and known separation distance.
Determine the force of gravitational attraction between the earth (m = 5.98 x 1024 kg) and a 70-kg physics student if the student is standing at sea level, a distance of 6.38 x 106 m from earth's center.

The solution of the problem involves substituting known values of G (6.673 x 10-11 N m2/kg2), m1 (5.98 x 1024 kg), m2 (70 kg) and d (6.38 x 106 m) into the universal gravitation equation and solving for Fgrav. The solution is as follows:

Determine the force of gravitational attraction between the earth (m = 5.98 x 1024 kg) and a 70-kg physics student if the student is in an airplane at 40000 feet above earth's surface. This would place the student a distance of 6.39 x 106 m from earth's center.

The solution of the problem involves substituting known values of G (6.673 x 10-11 N m2/kg2), m1 (5.98 x 1024 kg), m2 (70 kg) and d (6.39 x 106 m) into the universal gravitation equation and solving for Fgrav. The solution is as follows:

Two general conceptual comments can be made about the results of the two sample calculations above. First, observe that the force of gravity acting upon the student (a.k.a. the student's weight) is less on an airplane at 40 000 feet than at sea level. This illustrates the inverse relationship between separation distance and the force of gravity (or in this case, the weight of the student). The student weighs less at the higher altitude.


Let's see an example of limitation
As a star ages, it is believed to undergo a variety of changes. One of the last phases of a star's life is to gravitationally collapse into a black hole. What will happen to the orbit of the planets of the solar system if our star (the Sun shrinks into a black hole)? (And of course, this assumes that the planets are unaffected by prior stages of the Sun's evolving stages.)
Newtons law of gravity doesn't answer this question. as per his law nothing will happen.. The shrinking of the sun into a black hole would not influence the amount of force with which the sun attracted the Earth since neither the mass of the sun nor the distance between the Earth's and sun's centers would change.

 Newton rightly saw this as a confirmation of the "inverse square law". He proposed that a "universal" force of gravitation F existed between any two masses mand M, directed from each to the other, proportional to each of them and inversely proportional to the square of their separation distance r. In a formula (ignoring for now the vector character of the force):

F   =   G   mM/r²

Suppose M is the mass of the Earth, R its radius and m is the mass of some falling object near the Earth's surface. Then one may write

F   =   m   GM/R²   =   m g

From this

g   =   GM/R²

The capital G is known as the constant of universal gravitation

Gravity in our Galaxy       

    Gravity obviously extends much further than the Moon. Newton himself showed the inverse-square law also explained Kepler's laws--for instance, the 3rd law, by which the motion of planets slows down, the further they are from the Sun.

    What about still larger distances? The solar system belongs to the Milky Way galaxy, a huge wheel-like swirl of stars with a radius around 100,000 light years. Being located in the wheel itself, we view it edge-on, so that the glow of its distant stars appears to us as a glowing ring circling the heavens, known since ancient times as the Milky Way. Many more distant galaxies are seen by telescopes, as far as one can see in any direction. Their light shows (by the "Doppler effect") that they are slowly rotating.    Gravity apparently holds galaxies together. At least our galaxy seems to have ahuge black hole in its middle, a mass several million times that of our Sun, with gravity so intense that even light cannot escape it. Stars are much denser near the center of our galaxy, and their rotation near their center suggests Kepler's third law holds there, slower motion with increasing distance.

    The rotation of galaxies away from their centers does not follow Kepler's 3rd law--indeed, outer fringes of galaxies seem to rotate almost uniformly. This observed fact has been attributed to invisible "dark matter" whose main attribute is mass and therefore, gravitational attraction (see link above). It does not seem to react to electromagnetic or nuclear forces, and scientists are still seeking more information about it.

We are in our new home. It is a new experience. Everything we touch, we feel it. Always in mind, it is our home. I hope this will remain.
Farhan likes the stair potion most. He goes on the top and slides down slowly. This is a scary thing to watch, suddenly he might miss a or slip one step and rollover down to the wall. His mom initially was very careful and had a lot of advice to him not to do that. Overtime it seems she lost her interest. Meantime Farhan is mastering his capability.
Fahmia seems indifferent. She does not look like interested on lot of things. She is completely busy with the TV and Netflix.
Urmi is serious with the kitchen. She liked the new oven very much. Many features of the oven she is still discovering.

Mid of November. The days are getting shorter. At 5pm it is quite dark outside. It is raining today. As it is cloudy, the darkness started even an hour before.  Rain in November in British Columbia is very normal.

End of November we are moving to a new residence. This is our own residence. We bought a small town home in North Vancouver recently.

It is more than five years we are in Canada and about three and half years in Vancouver. We spent all these years in rented home. It is nice to be in rented apartments. Do don't have to worry about all problems related to renovation or repairing. Whenever you have a problem, building manager is there to help you. If it is your own, only you are the man to help yourself.

We did not look for houses for very long though we were planning to buy something. We felt socially outcast and specially in social gathering we could feel the pressure. People are very much enthusiastic to discuss about their houses and we had enough advise from all corners. At last we decided, let's go for something.   

Beginning  of September 2013. This September is not different than other falls here in Vancouver. The temperature is still like summer. Sunny and bright Vancouver and it is fum. Still we go outside wearing T shirts.
Furhan is in very good mode. This year he will go to Kindergarten. He is excited. We went the store to buy his new stuffs for school. He took this preparation long back. We bought his bag last year when we bought one for Fahmia. This time several other items we bought and Farhan was in full gear. He chose many of the items like his Creon, pencil and even his note book.
On the night of second September, Farhan went to bed with full of dream. He had his stories ready for his class tomorrow. He prepared his school bag. Though on the first day his school will be just for an hour, yet he decided to take his lunch box and water bottle. His bag got a sizable shape.
On the next morning on 3rd September, along with Fahmia I drove him to the school. The legendary Queen mary elementary school. The shifted school is about three km from our home due to contruction to the main building which is very close to where we live in.
First day was very good for him and came back to home with in hour. Still he is excited and ready for the second day of school. It will be for about two hours.
On the second day I drove farhan to the school along with Fahmia as usual. Today a small mishap happened. Most of the school students returned from school by school bus. But Farhan was not there. As I dropped him to school, school authorities thought we will pick him up. But we thought Furhan will come by bus. Any way, the school principal drove Farhan to the spot from where all other parents are supposed to pick there children.
But the problem happened with Farhan. He decided he will not go school any more. Urmi did a detailed investigation why he does not want to go to school. The reason he wants his mom to be in the school with him.
While I am writing, today is Saturday. We are waiting for Monday when Farhan will go to his school for third day.

  

 

This is how you look at it. Last August 24 was Fahmia's 10th birthday. She already past ten years of her life and I see how the time is going in its own way.
For new a fathers it is an experience that he never had before. Something that you can not express. It was an  early evening on 23 of August, 2003. I was walking at a place close to Dhaka Airport. There was a newly established vegetable market close to airport railway station. I had a plan to buy some fresh vegetable. Suddenly I got a call from my wife, she is not feeling well.
I knew that she was not feeling well as long as her pregnancy was going at seven month stage. We just had a doctor's consultation one day before. The doctor was quite happy with her progress. Still every situation counts and needs special attention.
When I went back, we decided to visit the doctor again. It is not very close and those who know the traffic in Dahaka can realize the travelling distance from Airport to Dhanmondi. Any way, while travelling my wife was quite normal. Fortunately in that night, it did not took that long for us to travel to the Dhanmondi to Dr. Maliha's office. My wife was admitted immediately.
As you are a first time father, you don't know what to do. I talked with the doctor who was there at that time. My mother in law came to hospital to see us. I left the hospital as I thought everything was ok and she will feel better very soon. I came back to our resident leaving my wife and mother in law in the nursing home.
I can't remember how was my sleeping in that night. But next day early in the morning I got a phone call. Probably I did not understand what my wife said. Normally don't receive all the message when you just woke up. But I understood, Urmi is in the labor room.
I had a quick breakfast and immoderately started for the hospital. It was about 7:00 in the morning and traffic was bad. While I was in the transit, I got a phone call from my mother in law that I already became a father.