Sir David presented Prince George with a fossilised shark tooth at a screening of his new programme.
Northern Ireland's department of health reported one further death and 319 positive cases on Saturday.
It comes as the number of new cases in the UK topped 6,000 for the fourth consecutive day.
Every case is estimated to result in between 1.2 and 1.5 further infections, government estimates find.
The Office for National Statistics said there was "clear evidence" of an increase in cases in all age groups.
The iconic motorcycle company is pulling out of India as it struggles to sell its two-wheelers.
China plans a digital version of its currency, which some say could become a big global payment system.
A Cuvier's beaked whale stays under water for almost four hours, leaving scientists puzzled.
The developers of the space-themed mystery game now say they want to focus on making the original better.
Prince's collaborators recall the chaotic but fertile sessions that produced his greatest album.