she had discovered the secret of "aburidashi". it involves soaking and crushing soybeans to make and crushing soybeans to make an ink which vanishes as it dries. it took her two hours to get the texture of the inkjust right. it almost fooled her professor, until he realised he need to heat the paper over his gas stove, and then the letters appeared. you can see them there on the right, the left hand side of the paper was not heated. having said all that she did leave him a clue when she handed the homework in, on an attached note, which i am not sure ninjas would do? a p pa re ntly apparently lemon juice also works. we do get a job if you area works. we do get a job if you are a ninja? —— would you get a job. this is beyond 100 days from the bbc. coming upfor days from the bbc. coming up for viewers on the bbc news channel and bbc world news — as president erdogan makes military gains but diplomatic losses over his operation in northern syria, we'll be asking if a coherent european response is possible. and nearly four weeks