Sealed Back to the Future VHS tape sells for $75,000 at US auction

Copy of film on now antiquated format was previously owned by actor Tom Wilson, who played Biff Tannen in movie series

Michael J Fox in Back to the Future. The auction featured 260 sealed VHS tapes. Photograph: Universal/Allstar

A sealed VHS tape of the hit 1980s movie Back to the Future has sold for $75,000 in the first ever auction of the now antiquated video-playing format.

Dementia and sleep: What do we know about this link?

Dementia affects at least 55 million people worldwide and the number is increasing by about 10 million every year. In part, this is because we are living longer, but dementia is not an inevitable part of aging. So, are there ways to decrease our risk of developing dementia? Much research is currently focusing on the potential role of sleep.

What is the link between dementia and certain sleep patterns? Image credit: Oleksii Syrotkin/Stocksy.

According to the World Health Organization (WHO), “dementia is currently the seventh leading cause of death among all diseases and one of the major causes of disability and dependency among older people globally.”

Scientists grew living human skin around a robotic finger

The advance brings Terminator-like cyborgs a small step closer to reality

Living human skin covering a robotic finger can bend with the finger (shown) and self-heal.

The Terminator may be one step closer to reality.

Researchers at the University of Tokyo have built a robotic finger that, much like Arnold Schwarzenegger’s titular cyborg assassin, is covered in living human skin. The goal is to someday build robots that look like real people — albeit for more altruistic applications.

Now transfer WhatsApp data from Android to Apple iOS: Here’s how it works

Finally, WhatsApp users on Android will be able to transfer their chats and other data if making the switch to Apple's iPhone. Here's how the feature will work, which was one of the most requested.

There is finally an easy way to transfer your WhatsApp data between Android and iOS.

There’s good news for Android users who have been looking to switch to an iPhone but are worried about preserving their WhatsApp data. WhatsApp and Apple have announced support for porting data from the messaging app on Android to iOS. The option will be available in WhatsApp’s beta version. It will roll out slowly and take about a week to get to all users. Last year, Google and WhatsApp announced that users would be able to transfer chats from iOS to Android.