给我列出前五个最近发布的科技新闻标题，并为每个标题提供一句简要说明。
1. "Facebook's Ray-Ban smart glasses unveiled" - Facebook has partnered with Ray-Ban to release smart glasses with built-in cameras and speakers that allow users to take pictures, make calls, and listen to music.
2. "Elon Musk unveils Tesla's humanoid robot, the Tesla Bot" - Tesla's new robot is designed to perform tasks that are dangerous, repetitive, or boring for humans, such as going to the store to buy groceries.
3. "Apple unveils new iPhone 13 lineup" - The new iPhone 13 models feature improved cameras, longer battery life, and a new A15 chipset that promises faster performance.
4. "Google introduces new privacy features for Android users" - Android users will now have more control over their data with features such as microphone and camera access indicators and an option to automatically delete search history.
5. "Amazon announces Astro, a home robot with Alexa built-in" - The Astro robot can move around the home and perform tasks such as checking on pets, monitoring security cameras, and playing music, all controlled by Amazon's Alexa virtual assistant.