Google is bringing Nest back into the fold. Nest, known for it's slick thermostats and user-friendly security cameras, was acquired by Alphabet (then called Google) for $US3.2 billion ($4.1 billion) in 2014. Since then the company has grown - according to Geekwire it has more than quadrupled its staff, and it's rolled out a wide range of products, including cameras, an alarm system and a smart doorbell. Now the company, which Nest CEO Marwan Fawaz claims has shipped over 11 million devices to date, is being brought back into Google, and that means Google is about to get a lot more intimate with your home.