The Indian police have uncovered a chain of fake call centres in Mumbai and arrested 70 people who posed as officials of U.S. tax department and scammed thousands of Americans..  SEE ALSO: Hackers steal frequent-flyer miles worth Rs 1.6 million from Air India The fraudsters ran fake call centres and sent threatening voice mail messages telling the U.S. citizens that they owed tax and must respond.

We're entering a new dimension of GIFs. A relaunched Giphy Cam app on iOS — dubbed Giphy Cam 2.5 — will allow users to place animations next to real-life footage. The "stickers" will follow you or your friends around in three dimensions, pivoting Giphy from simple 2D animations and into a sort of augmented reality. You can save your loops and share them with your friends via text message, Instagram, Google Hangouts, whatever.

Innovations are constantly improving our world, especially when it comes to tackling global inequality. With brainpower and skill, inventors are taking on the world's biggest problems with tenacity and creativity. In September alone, innovators created an edible drone to deliver food-based aid and a 3D-printed clitoris to better educate children on women's health and sexuality.

Google's product announcement in San Francisco Tuesday centered on the company's answer to Amazon's Alexa and Apple's Siri: Google Assistant.  SEE ALSO: Pixel is here: Follow Google's event live The tech behemoth announced a slew of new products that integrate with the artificial intelligence technology, the most noteworthy of which is the first Google flagship phone, the Pixel.

As self-driving cars slowly make their way onto our roads, how will developers help these autonomous vehicles make difficult decisions during accidents? A new MIT project illustrates just how difficult this will be by mixing gaming with deep moral questions.  SEE ALSO: Where you can hail self-driving Uber cars The Moral Machine presents you with a series of traffic scenarios in which a self-driving car must make a choice between two perilous options.

At last, there's another place to sell items to strangers on the internet. Facebook debuted a new "Marketplace" for its iOS and Android apps Monday, allowing users to buy and sell items via a new tab at the bottom of their News Feed. Marketplace will let you make offers for items, but no money is directly exchanged on Facebook's platform, product manager Mary Ku told Mashable in an interview about the feature.