In the Telegraph, Questor takes on one of the most interesting stocks currently being traded in the UK, Sirius Minerals, the firm which wants to develop a massive potash mine in the North Yorkshire Moors. Potash is used in the production of fertiliser and demand is expected to grow hugely with global population growth. Apparently Yorkshire has a deposit of the rarest and most valuable form of potash. Sirius has now revealed where it wants the 'mine head' will be, about two and a half miles from Whitby. Of course there are massive funding and environmental questions the firm has to answer but, if the mine is given the go ahead, the income could be huge. Questor says the stock is an "interesting medium term play" but advises "there are risks ahead".In The Times, Tempus considers the claims of document scanning business Kofax that it would be worth more with a listing on NASDAQ. The company has recently moved its headquarters from Basingstoke to California where most of its employees are but the frustration with the FTSE is that the Chief Exec believes Brits don't properly understand the value of tech firms. Trading at 13 times earnings, it seems Tempus is one of those typical British sceptics: "little more than a hold".Rather unusually Tempus also considers an AIM-listed firm, online dating company Cupid. It's shown an impressive ability to grow sales, with more than half its revenue coming from outside the UK and Australasia. Interestingly for an online start-up, the price-to-earnings ratio is a relatively pedestrian 13 times. With the customer base of hopeful singles growing Tempus thinks Cupid's attractive, but "highly speculative".Please note: Digital Look provides a round-up of news, tips and information that is impacting share prices and the market. Digital Look cannot take any responsibility for information provided by third parties. This is for your general information only as not intended to be relied upon by users in making an investment decision or any other decision. Please obtain a copy of the relevant publication and carry out your own research before considering acting on any of this information.BS