SoF alert:

This week’s SoF was easy. First one I’ve got right this year. Bees obviously can add and subtracting. They’re very intelligent. I wonder if the spread of antibiotic resistant soil bacteria to the Arctic within 3 years is due to bird crap from migratory species?

Another explanation of the calculation that there’s a 50/50 chance of two unrelated persons sharing a birthday is with 23 people. With one person, there’s a 365/365 chance of that person having a birthday. There’s a 364/365 chance of a second person

**not** having the same birthday of the first, and there’s a 363/365 chance of a third person

**not** having the same birthday as either of the first two people, working down to the 23rd person having a 343/365 chance of

**not** having the same birthday as any of the previous 22 people.

So to calculate the probability of one of the 23 people not sharing at least one birthday, you multiple all the separate probabilities together. That is 365/365 x 364/365 x 363/365 x 362/365 x ... x 343/365. You’re multiplying 22 numbers, all less than 1 - and getting progressively smaller, which means than the final product rapidly deviates from 1 (365/365). And the chance of having at least two people sharing a birthday is 1 minus the number you’ve just calculated, which is getting progressively smaller the more people you add (a probability of 1 is certainty).

Regarding celery juice. The first thing I thought of was - what does it taste like? My passion is carrot juice, which I love. I tried a blender, but the taste is rather bland. I use a juicer. From 500 g of carrots, I can get 250 g of carrot juice, which has an intense taste. I don’t waste the pulp. I mix it with yoghurt. Or microwave it with a scrambled egg. Or tofu. I can eat it with a vegetable casserole. Or eat it on its own. Or use it as a spread on bread.

The only downside is that I’m eating 500 g of carrots, but fortunately excessive carrots appears to be relatively benign beyond carotenaemia and increased lung cancer in smokers and ex-smokers.

I tried juicing Brussel sprouts when I’d purchased too many of them, but that was a disaster. From 350 g of sprouts, I got just 50 g of juice.