The term 4×4 means a four-wheel-drive vehicle. Technically, the first digit is the number of wheels and the second is the number that are driven, so a four-wheel-drive pickup truck is a 4×4 ...

Scientists have solved the mystery behind ancient circular earth rings in Australia, revealing they were constructed by the Wurundjeri Woi-wurrung people between 590 and 1,400 years ago. The large ...

Besides the tag networks, the two smart tags share other key features, such as Bluetooth 4.0 support for short-range tracking, a rechargeable battery for a longer lifespan, and an IPX6-rated build ...