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Two iOS 8 users are suing Apple for not telling about the amount of memory required by its flagship operating system.

The legal complaint revolves around iOS 8 and the amount of memory it reserves for itself on iPods, iPhones and iPads.

The complaint alleges that it takes up so much space that far less than advertised is left for people to store their own data.

Apple has yet to issue any official comment on the lawsuit.

The complaint has been filed in California by Miami residents Paul Orshan and Christopher Endara who say that iOS 8 can occupy up to 23.1% of the memory available on some Apple devices.

In addition, upgrading devices from the earlier iOS 7 to 8 can cause people to lose up to 1.3 gigabytes of memory, said papers filed in support of the legal action.iOS 8 too big for iPhone or iPad

The amount of memory taken up by iOS 8 can mean users run out of storage and, Paul Orshan and Christopher Endara allege, this is helping Apple force people to sign up for its fee-based iCloud storage system.

The lawsuit is seeking millions of dollars in damages for those using Apple devices facing the storage squeeze.

So far, Apple has not responded to requests for comment on the lawsuit.

The latest upgrade to iOS 8 was released in late September but Apple was forced to withdraw and then re-issue it because the first version meant a lot of iPhone 6 and Plus handsets could no longer make calls.

Apple issued a public apology over the botched update but said only 40,000 people were affected by it.

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Scientists have discovered the mechanism by which a good night’s sleep improves learning and memory.

The scientific team in China and the US used advanced microscopy to witness new connections between brain cells – synapses – forming during sleep.

Their study, published in the journal Science, showed even intense training could not make up for lost sleep.

Experts said it was an elegant and significant study, which uncovered the mechanisms of memory.

It is well known that sleep plays an important role in memory and learning. But what actually happens inside the brain has been a source of considerable debate.

Sleep plays an important role in memory and learning

Sleep plays an important role in memory and learning (photo Tumblr)

Researchers at New York University School of Medicine and Peking University Shenzhen Graduate School trained mice in a new skill – walking on top of a rotating rod.

They then looked inside the living brain with a microscope to see what happened when the animals were either sleeping or sleep deprived.

Their study showed that sleeping mice formed significantly more new connections between neurons – they were learning more.

And by disrupting specific phases of sleep, the research group showed deep or slow-wave sleep was necessary for memory formation.

During this stage, the brain was “replaying” the activity from earlier in the day.

Further tests showed how significant sleep was.

Mice doing up to an hour’s training followed by sleep were compared with mice training intensively for three hours but then sleep deprived.

The difference was still stark, with the sleepers performing better and the brain forming more new connections.

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