Jockey Ian Popham celebrates his victory onboard Annacotty in the Paddy Power Gold Cup Chase during day two of The Open at Cheltenham racecourse. Photograph: David Davies/PA

Ian Popham put his injury nightmares behind him after enjoying a deserved change in fortune when striking on the big stage with victory aboard Annacot(...)

Mark Walsh riding Shantou Flyer (far left) clears the last on the way to winning   The Ryman Stationary Cheltenham Business Club Novices’ Steeple Chase at Cheltenham. Photograph: Alan Crowhurst/Getty Images

Colin Bowe was thrilled to saddle his first winner at Cheltenham as Shantou Flyer lunged late to land the Ryman Stationery Cheltenham Business Club No(...)

Jack Dorsey, the new chief of Twitter. Photograph: Bryan Thomas/The New York Times

At 7:45am on October 15th, 2008, Jack Dorsey was called to a meeting at the Clift Hotel in San Francisco. He arrived wearing a black beanie hat and a (...)

Jack Dorsey: “My entire focus is to make sure that Twitter is going to be amazingly successful.”  Photograph: Justin Tallis/AFP/Getty Images

For the past two years, the normally dapper Jack Dorsey has hardly been seen at the offices of Twitter, the social networking company he co-founded, e(...)

Outgoing Twitter chief executive Dick Costolo’s impending departure has been influenced by investors unhappy with stagnant user growth and the absence of profit. Photograph: Richard Perry/The New York Times

Some shock waves went through Silicon Valley this week when Twitter chief executive Dick Costolo abruptly announced he was stepping down. The microbl(...)

  Dick Costolo, Twitter’s embattled chief executive, at the New York Stock Exchange during the company’s market debut. Photograph: Richard Perry/The New York Times

Twitter chief executive Dick Costolo abruptly announced he was stepping down on Thursday amid increasing scrutiny of the company’s slow user growth an(...)

Teaforthree (foreground) jumps the last on the way to finishing third in the 2013 Grand National at Aintree.  Photograph: Adrian Dennis/AFP/Getty Images.

Plans are on hold for Teaforthree after he missed a run at Warwick yesterday because of a bruised foot. The 11-year-old was set to compete in the Will(...)

The British hunt season is well under way and continues at Sandown on Saturday.

Balder Succes will face nine rivals when he bids to justify favouritism in the Tingle Creek Chase at Sandown on Saturday.With star two-milers Sprinter(...)

 It may surprise, but tech gurus are limiting the amount of screen time their children get. Photograph: Anders Andersson/Getty

When Steve Jobs was running Apple, he was known to call journalists to either pat them on the back for a recent article or, more often than not, expla(...)

Some of Twitter’s biggest investors are hanging on to their stock, even as restrictions on selling the shares are set to lift today. About 480 million(...)