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Washington, Nov 7 : A new research has revealed that the largest and most sensitive visible-light imaging survey of dusty debris disks around other stars has been completed.

These dusty disks, likely created by collisions between leftover objects from planet formation, were imaged around stars as young as 10 million years old and as mature as more than 1 billion years old.

Survey leader Glenn Schneider from the University of Arizona said that it's like looking back in time to see the kinds of destructive events that once routinely happened in the solar system after the planets formed.

Washington, Nov 7 : Rachel Bilson has welcomed a baby girl with Canadian actor be

Washington, Nov 7 : Facebook has launched a fundraising campaign to help groups fighting Ebola.

The social networking site's founder Mark Zuckerberg has also announced a personal 25 million dollars donation to help battle the deadly disease, CNN reported.

Zuckerberg's donation went to the Centers for Disease Control Foundation. But Facebook is seeking donations for three other groups: the International Medical Corps, the International Federation of Red Cross and Red Crescent Societies and Save the Childre and the site's 1.3 billion users will see a message at the top of their news feed with an option to donate to those groups.

Washington, Nov 7 - A new research has observed that a new virus called canine distemper virus (CDV) is proving to be a threat to the tiger populations in the wild.

According to a new study from the Wildlife Conservation Society (WCS) and its partners, CDV has the potential to be a significant driver in pushing the animals toward extinction.

The authors evaluated these impacts on the Amur tiger population in Russi's Sikhote-Alin Biosphere Zapovednik (SABZ), where tiger numbers declined from 38 individuals to 9 in the years 2007 to 2012. In 2009 and

London, Nov 07 - Mobile messaging service WhatsApp has reportedly come up with a new " double blue tick" feature that allows users to know when their texts have been delivered and read.

The blue tick appears as soon as the person at the receiving end has read the message.

According to Daily Express, one grey tick means a message has been successfully sent, two grey ticks show it has been delivered and a blue tick means the message has been read.

The app now also shows the exact time a text was sent. Users need to press and hold down on a particular post to know the accurate time the message was sent to them.

London, Nov 07 - United States President Barack Obama has reportedly sent a "secret letter" to Iran's Supreme Leader Ayatollah Ali Khamenei describing a shared interest in combating the Islamic State ( IS).

According to the BBC, Obama stressed that any co-operation in taking on the terror group is dependent on Iran reaching a nuclear agreement by November 24 diplomatic deadline.

The letter was sent last month and is at least the fourth letter written by Obama to Khamenei after he assumed office in 2009.

U.S. Secretary of State John Kerry is scheduled to begin negotiations on the issue with Iranian counterpart Javad Zarif this weekend in Oman.