Thursday, November 21, 2013

Mars meteorite 1st look at Red Planet's ancient crust


Sawn surface of the Mars meteorite NWA 7533 showing both light and dark clasts in grey matrix. (LUC LABENNE)

Polished Section of Tissint Meteorite
A meteorite found last year in the Sahara Desert is likely the first recognized piece of ancient Martian crust, a new study reports.

The Mars meteorite NWA 7533 is 4.4 billion years old and contains evidence of long-ago asteroid strikes, suggesting that the rock came from the Red Planet's ancient and cratered southern highlands, researchers said.

"We finally have a sample of the Martian highlands, that portion of Mars that holds all the secrets to Mars' birth and early development," lead author Munir Humayun of Florida State University told SPACE.com via email. [Photos: Amazing Meteorites from Mars]

"It's the part of Mars' history where the oceans and atmosphere developed, and where life would have developed if it ever did on Mars," Humayun added. "I will liken this to opening a treasure chest — it may take a while before we find the best treasures, but treasures aplenty lurk in this meteorite."

'I expect more surprises as we dig deeper into our Martian treasure chest.'
- Munir Humayun of Florida State University



Humayun and his colleagues subjected NWA (short for northwest Africa, where the rock was found) 7533 to a series of analyses. The researchers determined the meteorite's age, for example, by determining that crystals within it called zircons formed about 4.4 billion years ago.

"This date is about 100 million years after the first dust condensed in the solar system," Humayun said in a statement. "We now know that Mars had a crust within the first 100 million years of the start of planet-building, and that Mars' crust formed concurrently with the oldest crusts on Earth and the moon."

The team also found high concentrations of normally rare elements such as nickel, osmium and iridium in NWA 7533, indicating that the rock formed in a region that was pummeled by chondritic meteors, which are relatively enriched in these materials.

Further, after measuring the abundances of certain elements within the meteorite, Humayun and his team were able to calculate a thickness for the Red Planet's crust.

"The amount of melting on Mars was low, sufficient to accumulate a 50-kilometer-thickness [31 miles] crust, but Mars evidently escaped the giant impact-style melting that affected the Earth and moon," Humayun told SPACE.com. (Most scientists think the moon formedfrom material blasted into space when a planet-size body crashed into Earth more than 4 billion years ago.)

"This is the first reliable geochemical estimate of the thickness of Mars' crust, and it agrees with geophysical estimates from gravity and topography," he added.

Though researchers believe ancient Mars was relatively warm and wet, the team found no hydrous silicate minerals — which form in the presence of liquid water — within NWA 7533. Scientists will likely unearth more such puzzling details as they study the meteorite further, Humayun said.

"I expect more surprises as we dig deeper into our Martian treasure chest — some we will understand, and others may continue to befuddle us for a while to come," he said.

By Mike Wall | Published November 21, 2013 | Space.com

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Apple Reportedly Developing Large Curved Screen iPhones For Late 2014 With Better Touchscreen Sensors..




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tech news

How to Move Mouse Cursor with KEYBOARD in Windows




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Wednesday, November 20, 2013

. Here i am going to introduce a new tool named as Windows Password Killer. It enables you remove windows 7 password to reset the administrator, standard user and guest passwords easily without any data losing or file damage.

There is 3 different editions - the Lite, Pro and Ultimate, here we take the Pro edition as an example for the password remove process with USB drive (CD/DVD also supported too).

Requirements:
1. Any Accessible Computer.
2.USB Drive or CD/DVD 

Step 1: Install Password Killer

Download the Windows Windows Password Killer from Here. 
Install the windows Password Killer in your friends or any accessible computer.


                                               Step 2:Burn a bootable CD/DVD or an USB drive
  1. Insert the USB Drive or CD/DVD.
  2. Run the Windows Password Killer.
  3. Select the USB drive or CD/DVD.
  4. click the Create button.
  5. It will ask you to verify whether you select correct disk or not. Click "Yes" button.

Step 3: Boot from USB Drive OR CD/DVD 
Now let us come to our locked computer.
  • Insert your USB Drive before turn on the system(if you are using CD/DVD, you have to turn on and insert). 
  • Now turn on the system, press F10 or F12(it may vary for your system) to choose the booting device. 
  • Select the USB drive or CD/DVD.
It will boot into Windows Password Killer.

Step4 : Reseting Password
After program starts, select Windows 7 system on the start page, click 'Next'.

Select your target user accounts, and then click 'Next' to proceed the Windows 7 password recovery/unlock process. 
The Windows 7 Administrator password or other user accounts password is reset successfully now. Take out the password reset CD/DVD, click 'Reboot' to restart your computer.
Enjoy.!!
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