For me it was Everest, the (sub) four minute mile and the Coronation.
A little later, I remember headlines saying 'Fuchs off again' - I think in the Mail or the Express. Sir Vivian Fuchs the explorer was apparently off to whichever Polar region he had then set his sights on. Of course, I didn't understand the innuendo in the headline, about which there was a bit of a stir.
Then there was a Sunday People type of running story about a Guinness heiress who eloped with her amour, Dominic Elwes.
I remember the love lives of 'playboys' such as Aly Khan and Porfirio Rubirosa playing large in the Sunday papers. That was as well as film star Lana Turner, a gangster called Johnny Stompanato and a gangland stabbing in which she was implicated.
Never a dull moment in the 50s!