There a few reasons why you might want to build your own distribution.
You could create a standard distribution, but with a desktop that you are more comfortable with.
You might need to put something small and lightweight together for an older computer.
You might need to build a live media ISO that you are able to carry around with you and to bring your favourite set of tools to bear when you need them.
SUSE Studio allows you to build a customised SUSE Linux installation using a web interface.
Start by setting up an account on the SUSE Studio website (http://susestudio.com).
You do this by following the 'Sign In Or Create An Account' link on the front page.

After creating a new account or using one of your existing social networking accounts such as Facebook, Google or OpenID , click on 'Create New Appliance...' functionality under the Actions.
On the next screen, choose the GNOME Desktop base template, making sure that you are selecting from the templates that relate to the latest version of SUSE Linux.
Scroll down to the bottom of the window to choose your architecture  and then give your appliance a name and click 'ok'.

You will get a page as below and next step is to configure your appliance.

Start with the 'Software' tab. Let's say you'd want to add Office to your desktop, then type the word 'libre' into the search box. The packages are by default sorted by popularity; the OfficeLibre package will be displayed on the top of search list.Click the '+add' button to add this package. 

Add Firefox too. You can also add extra repositories and even custom RPM packages.

Proceed to the Configuration tab and select the General sub-tab. In here, select your language and keyboard layout and leave the other options as default.

Moving to the Personalize sub-tab of the Configuration page, we can now add some custom branding. Upload/select your logo and background.

In the 'Desktop' sub-tab, you can select the 'Automatic desktop user log in' option.

In the 'the Appliance' sub-tab,you can define the parameters of a virtual machine that will directly boot within a visualiser, if you want to create a VM environment. Here, you can choose options such as allocated memory and set up the LVM partition arrangement.

The Files tab is worth a visit if you need to add custom files to the distribution. You can add single files or archives. For example, if you wanted to add a file to the desktop of every new user, you should upload it and specify that it should be placed.If you wanted to place a file within the home directory of the user that you have created called tux, add it to '/home/tux'.

Now you can move to the 'Build' tab. In order to create a traditional installation ISO, select 'Preload ISO (.iso)' in the Default format and click on the 'Build' icon.

This can take a few minutes to complete, depending on how large and complicated your custom image is.Once built, your appliance remain on the site for a few days and can be downloaded. The tab 'Share' allows you to share your finished appliance with other users.

Boot the finished ISO, same as any other installation ISO. 

How many cells are in your body?

There is no real consensus on the number of cells in the human body. Estimates put the number between ten trillion and one hundred trillion. The number of cells depends on the size of the person: bigger person, more cells. Also, the number of cells in our body keeps changing as old cells die and new ones form.

Cells come in different sizes, and they grow in different densities. If you used their density to estimate the cells in a human body, you’d come to a staggering 724 trillion cells. The mean weight of a cell is 1 nanogram. For an adult man weighing 85 kilograms, simple arithmetic would lead us to conclude that that man has 85 trillion cells.
We have 50 billion fat cells and 2 billion heart muscle cells…Adding up the total number of each kind of cell, the scientists came up with…37.2 trillion cells. This estimate is not including the microbiome - bacteria, fungi and archaea, microorganisms that share our body space.The human body contains over 10 times more microbial cells than human cells.

A cell can die in many ways - through infection, poisoning, overheating or lack of oxygen. An uncontrolled death is messy: the cell swells up, and its contents leak away. This may damage surrounding cells. But there is another way, programmed self-destruction, or apoptosis. Cells often choose to kill themselves. This controlled cell death is crucial for normal human development and good health throughout life. Liver cells last about a year and half. Red blood cells live for 120 days. Skin cells are good for 30 days. White blood cells survive for thirteen days. And it turns out that the great majority of cells in the human body are bacterial cells, and most are beneficial. It is hard to believe that the average adult loses close to 100 million cells every minute. The good news is that the body, through cell division, is replacing those lost 100 million cells every minute.