My contributions would be:

1. The Spanish word for 'suck' is 'chupar'. Hence Chupa Chups!

2. Every Covid-19 particle in the world at present would fit in a wine glass.

3. The subject of alternating ovary ovulation is more complicated that I first thought.

4. No 1 singles in the UK pops charts of 50 years ago (i.e. for the year of 1971) started with 'Grandad' in January and ended with 'Earnie' by Benny Hillin December - and Chirpy Chirpy Cheep was in the mix in the middle of the year.

5. The list of No 1's in the album chart throughout the year had a bit more gravitas about it: George Harrison, The Stones, Floyd, ELP, The Who, Zep, Deep Purple and Rod Steward all having basked in success.