Econstudentlog

Wikipedia articles of interest

1. Goiânia accident. This is just a horrible story.

2. Inverse-square law. That law is like, really important, in so many areas (not just thinking about Japan right now, although..).

3. Myco-heterotrophy.

“Myco-heterotrophy is a symbiotic relationship between certain kinds of plants and fungi, in which the plant gets all or part of its food from parasitism upon fungi rather than from photosynthesis. A myco-heterotroph is the parasitic plant partner in this relationship. Myco-heterotrophy is considered a kind of cheating relationship and myco-heterotrophs are sometimes informally referred to as “mycorrhizal cheaters”.”

4. Fermat’s Last Theorem. Right now I’m reading Simon Singh’s book, it seemed natural to add this link to this post.

5. Seahorse.

Fashinating creatures, here’s the part about reproduction:

“The male seahorse is equipped with a brood pouch on the ventral, or front-facing, side. When mating, the female seahorse deposits up to 1,500 eggs in the male’s pouch. The male carries the eggs for anywhere from 9 to 45 days until they emerge, expelling fully-developed, miniature seahorses in the water. Once the seahorse babies are released into the water, the male’s role is done and he offers no further care.”

[…]

“The number of young released by the male seahorse averages 100–200 for most species, but may be as low as 5 for the smaller species, or as high as 1,500. When the fry are ready to be born, the male expels them with muscular contractions. He typically gives birth at night and is ready for the next batch of eggs by morning when his mate returns.”

Yes, you got that right: When seahorses mate, it’s the male that’s pregnant.

6. Victoria Cross:

“The Victoria Cross (VC) is the highest military decoration which is, or has been, awarded for valour “in the face of the enemy” to members of the armed forces of various Commonwealth countries, and previous British Empire territories.

It takes precedence over all other orders, decorations and medals. It may be awarded to a person of any rank in any service and to civilians under military command.”

[…]

“The VC was introduced on 29 January 1856 by Queen Victoria to honour acts of valour during the Crimean War. Since then, the medal has been awarded 1,356 times to 1,353 individual recipients. Only 13 medals, nine to members of the British Army, and four to the Australian Army, have been awarded since the Second World War.”

[…]

“Due to its rarity, the VC is highly prized and the medal has fetched over £400,000 at auction.”

[sorry about the infrequent updates lately, I’ll try to be more active here the next couple of weeks]

March 18, 2011 - Posted by | biology, history, mathematics, Physics, wikipedia

2 Comments »

  1. Havde aldrig hørt om 1. Uhyggeligt.

    Comment by info | March 22, 2011 | Reply

  2. Ja. Især givet ofrenes uvidenhed og de forfærdelige konsekvenser den havde. Og givet at det er let at komme til at tænke, at det næppe vil være sidste gang, sådan noget sker. Måske ikke lige i Brasilien. Men der er mange andre lande, hvor det at et lignende forløb på et tidspunkt vil udspille sig ikke forekommer spor usandsynligt.

    Comment by US | March 22, 2011 | Reply


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