In praise of the Persian melon

Once in a while, life presents you with a perfect. That is the story of the Persian melon for me.

It’s perfect from the moment you see it. It’s unmissable, even as it sits among seven different types of melons at our local Eastern European grocery in north London. The Persian melon is shaped like a rugby ball, with light orange skin that has ridges. Even though it’s large (weighing about three kilos), it’s easy to hold and drop into the tote bag.

It’s nothing like the smooth, round and all-too-heavy watermelon. You don’t have to clench your stomach and tighten your sphincter before you lift one. You don’t have to worry that it will accidentally slide out and splatter on the shop floor, splaying its insides in places hard to reach.

And the Persian melon smells good: sweet and summery. You can be sure it’s ripe and soft enough. Just give it a firm squeeze and a satisfying sniff. Unlike most other melons, you don’t have to wait to cut it open to find a mistake. You can be assured that the Persian melon will be worth the slightly awkward stares you get as you walk back home lugging around one of the heaviest fruits that you can buy at the grocers.

Now let’s face it: how many melons have you ended up spoiling because you could not bring yourself to cutting them? You picked one up at the shop because you wanted a tasty and healthy treat. But when it’s time to cut it (often days after you bought it), you don’t have the same enthusiasm.

I’m not blaming you. The undoing of a melon is a messy affair. Melons are nothing but balls of water held together by some thin biofilms and wrapped in a seemingly bullet-proof jacket. It’s never going to be as easy to cut into pieces as an apple.

The easiest melons to cut are cantaloupes. And, fortunately, the Persian melon is just like a large cantaloupe. The green rind is thick, but not too firm to cut out. That means there’s little risk of applying unnecessary force on the rind and cutting your hand instead. All the seeds are in the middle and thus there’s no need to spit out seeds when you eat the melon.

Once served in a big bowl, it’s a pleasure to eat. You can push in the fork without effort, and yet when you lift it the piece holds perfectly firm. There’s no drip and no risk of accidental spillage. So far so cantaloupe, except its color: a lovely white with a yellow tinge.

The best part is the magic in the mouth. This is where the Persian melon one-ups the cantaloupe (and the others). All melons are watery, but the Persian melon lets you taste the sweet water for as long as you’d like to taste it. The taste is subtle and refreshing. It hydrates the body and pampers the tongue. It’s sweet, but not too sweet. Once you stop eating, the sweetness stays with you for at least 15 minutes and the memory forever.

The physics of sand castles: Just add water

A day out on the beach would be incomplete without a sand castle. The mightier the castle, the better. But sand is next to useless as a building material. Without water it simply spreads out as wide as possible. So in search of a good recipe Daniel Bonn, a physicist at the University of Amsterdam, and colleagues have stumbled upon a formula for making the perfect sandy redoubt.

As they reveal in a paper published this week in Scientific Reports the key is to use sand with only 1% water by volume. Wet sand has grains coated with a thin layer of water. Owing to water’s surface tension this thin coat acts like skin stretched over many grains, holding them together by creating bridges between the grains. The strength of these bridges is enough to fight Earth’s gravity and prevent the structures from buckling under their own weight.

An easy way to achieve the right amount of water, Dr Bonn suggests, is to tamp wet sand in a mould (open at the top and the bottom) with a thumper at least 70 times, as he did in his experiments.

As for the design itself, unsurprisingly, the wider the base the taller the castle. According to calculations, using ideally moist sand, a column with a three inch diameter could rise as high as two metres. At 12 metres, the current world record for the tallest sandcastle, set by Ed Jarrett in 2011, used a base of roughly 11 metres. If Dr Bonn is right, sand engineers could in principle beat that with a castle thrice the height upon the same foundation.

First published in The Economist.

Image from here.

#ediblepeople: What an idea!

For those new to twitter or not aware of it, ‘#’ symbolises a hashtag. Using which we can track people tweeting about a particular topic. Last time I enjoyed a hashtag as a much as I did today it was #tweetlikesagarika (after Sagarika Ghose from CNN-IBN). Today it is #ediblepeople, @rameshsrivats who thought of this idea is a pure genious.

My contributions:

  • Pulao Picasso
  • Muhammad Thali
  • Kheema Chaudhary
  • Kofta Annan
  • John Lemon
  • Kulfi Annan
  • Coco Caramel
  • Stephen Fry
  • Leonardo Do Pyaza
  • Edible Murphy
  • Chilly Clinton
  • Arnold Schezwan

Here’s my favourite list:

  • Sagarika Gosht
  • Robin Uttapam
  • Kishore Biryani
  • Mutton Tata
  • Leander Peas
  • Chunky Soup Pandey
  • ChikooShake Bachchan
  • Salmon Khan
  • Shashi Khajoor
  • Paresh Chawal
  • Malai ka Sheera Wat
  • Bharta Dutt
  • Ladoo Prasad Yadav
  • Rabdi Devi
  • Kris Shrikhand
  • Anupam Kheer
  • Aam Admi
  • Rajma Sardesai
  • Jenson Mutton
  • Soup Dogg
  • Brad Pitta
  • Gerhard Burger

You can follow the excitement here.