james clayton, abc news, california. russ frushtick is co—founder of polygon, which provides news and reviews on tech and gaming. there's always criticism that these events are style over su bsta nce. do you ever get bored by these apple unveils? i guess it is part of the gig to not get bored by them. if i did, i should to not get bored by them. if i did, ishould probably to not get bored by them. if i did, i should probably be in a different business. but i do parliamentary wing. they trot out new features. the thing that stood out to me, the satellite was very interesting. also the fact they are bringing out the screen so you can glance at your phone and not have to leave it on all the time and see what time it is or what the temperature is, stuff like that. but i do agree with you, there is a diminishing returns, we are not seen a game changing moment that there used to be. it changing moment that there used to be. , ., ,., changing moment that there used to be. _, changing moment that there used tobe. _, ., to be.

and james clayton has been finding out why. twitter says that it has 240 million monetizable daily active users. millions of those accounts though are not real, they are bots, spam and fake accounts. that is something that twitter, and elon musk accept. but what they don't agree on is how many accounts are fake or even what a bot is. depending on how you define bot, you could have anywhere from less than i% to 20%. it is a debate that has turned into $41; billion question as elon musk attempts to back out of a deal to buy twitter. so how many bots are there on twitter? first of all, twitter claims that less than 5% of all of its daily active users are bots. elon musk, though, says that figure is nonsense. what do you think it is? what is the... if it is not 5%, what is it? i think it is a number- that is probably at least four or five times that number. this is why elon musk, at least he claims, is backing out of the deal. he has even accused twitter of fraud. the centre of the disagreement comes down to a definition. what actu

perhaps, it's a model that other companies will follow. james clayton, bbc news, san francisco.

james clayton, bbc news, san francisco. have a look at this. researchers have discovered the world's oldest heart. the 380—million—year—old fossil was discovered in western australia, in the gogo fish, which is one of our earliest evolutionary ancestors. the fossil captures a key moment in evolution that led to the emergence of the heart and other organs in the human body. here's our science correspondent pallab ghosh. this rock contains a heart that's hundreds of millions of years old. it's from a prehistoric creature that lived long before the first dinosaurs walked the earth — the gogo fish. it's the animal humans evolved from. we were all crowded around the computer and recognised that we had a heart and pretty much couldn't believe it, and then decided that it was incredibly exciting. this is a crucial moment in our own evolution and it shows that the body plan that we have evolved very early on, and we see this for the first time. the fossil was discovered more than ten years ago in the kimberley region of western australia. in fo

perhaps, it's a model that other companies will follow. james clayton, bbc news, san francisco. roger federer — one of the most successful tennis players of time has announced he is retiring at the age of a1. the 20 time grand slam champion — among them a record eight wimbledon titles has been strugging with a knee problem for the last three years. next week he'll play his last professional match in london. let's ta ke let's take you live to central london to westminster hall as thousands of people continue to file past the coffin of queen elizabeth ii. file past the coffin of queen elizabeth h.— file past the coffin of queen elizabeth ii. , . , elizabeth ii. they have paused 'ust elizabeth ii. they have paused just there _ elizabeth ii. they have paused just there for _ elizabeth ii. they have paused just there for a _ elizabeth ii. they have paused just there for a changing - elizabeth ii. they have paused just there for a changing of. just there for a changing of the bodyguards there. this is bbc news. hello there. the temperature on thursday afternoon got up to 21 degr