We've all been in this situation before: You hit "send" on an email, then wish you could take it back. Maybe you typed someone's name wrong or entered the wrong email address. With the newly updated Gmail app — the first real overhaul in four years — for iOS, you can now retract the email before it really goes out. The "Undo Send" button for mobile comes more than a year after Google graduated the same feature for desktop from beta to an official setting.

The iPhone's new "Bedtime" functionality within the alarm clock app is an innovative and interesting introduction. Working on the basis that being consistent with the amount of sleep you get (i.e., going to bed and waking up at the same time every day) is better for your health, this useful tool makes it easier to achieve this goal. But how do you get the most out of the new feature? Here's everything you need to know about the iPhone's Bedtime mode, from getting started to analyzing your results.

The founder of online fashion success story Showpo, Jane Lu, has pulled off a pretty cool prank, and for an even better cause. The Australian entrepreneur released a Facebook Live on Oct. 26 that seemed to showcase a dress which changed colour via an app. Her customers were obsessed, with the video netting tens of thousands views. Comments along the lines of "OMG where can I find this?!" flowed in. Except it wasn't real. That kind of technology doesn't exist (yet).

The MacBook Pro sorely needed an upgrade, but so did the MacBook Air, Apple’s original ultra-thin laptop, which never ever got the Retina screen treatment. Well, it was not meant to be. At today’s “Hello World” event, Apple’s Phil Schiller essentially killed off the Air by showing its replacement: the cheapest version of the new, 13-inch MacBook Pro.

You might never have to plug a charging cable into your iPhone again. Foxconn, the Chinese manufacturing company that builds electronics including the iPhone, is reportedly testing wireless charging modules that might make it into next year's iPhone 8, according to a report from the Nikkei Asian Review. Whether the iPhone 8 actually gets wireless charging will depend on the yield rates of the modules, a source told the Nikkei. Poor yield rates could push Apple to scrap the feature.

It was likely a combination of technological innovation and government regulation that prevented the chartered Boeing 737-700 carrying Republican vice presidential nominee Mike Pence and his entourage from a potentially serious disaster at New York's LaGuardia Airport on Thursday night.

For competitive gamers that don't quite meet the criteria to compete in professional tournaments all around the world, Microsoft is introducing Arena. Announced at the Microsoft Windows October event, Arena is a new feature on Xbox One and Windows PCs that allow gamers to create and play in custom tournaments, marking the company's entry into the world of esports. Xbox One is the first major console to allow players to create their own tournaments.

Now that the Pixel and Pixel XL have launched against the iPhone, Google's going after Microsoft's Surface Hub with Jamboard, its own collaborative digital whiteboard. The Jamboard makes it easier and more fun to collaborate with multiple teams on digital projects. Users simply write on the giant 55-inch touchscreen or organize media files on the display as if they were pinning things on a real whiteboard.

On Friday, a massive distributed denial of services attack (DDoS) knocked out access to a number of major websites. Although the incident appeared to target the U.S., its effects rippled out internationally, reportedly even reaching major banks and supermarket giants in Australia. While facts are still emerging, it seems the attack centred on Dyn, a domain name systems (DNS) provider that essentially acts like a phone book for major sites such as Twitter, Amazon, Tumblr, Reddit and Spotify.

In September, at the International Astronautical Congress in Guadalajara, Mexico, SpaceX CEO and founder Elon Musk revealed a grand plan to visit and, eventually, populate Mars. The Q&A session after the event was lacking to say the least, but now, during a Reddit AMA (ask me anything) session late Sunday, Musk shared a number of details about the company's ambitious plans to conquer Mars. This time around, Musk was able to skip the silliness and focus on highly technical aspects of the mission.