Teen Sci with WinK


Black-Widow Spiders

Posted in Uncategorized by wink on January 16, 2006

Do u know why some species of spiders r called Black-widow spiders? Coz the females usually eat the males after mating. In fact, many other animals eg female fireflies also devour males after mating. This sometimes happens unless if male have sense enough to scram quickly or offer another food supply for female.
This is why these females are larger than males.

Why such a carnivorous act? Coz they need proteins from males to produce good quality offsprings! The more nutritious the males, the healthier the offspriings.
Now the boys know how lucky they are to live in safety of male-dominated world! HUMPH!!!

Facts:

* Prey: insects
* Predator: Mud-Dauber wasps.
* The venom of the black widow spider is 15 times as toxic as the venom of the prairie rattlesnake.
* Only the female Black Widow is venomous; males and juveniles are harmless..
* Araneae is the Latin word for spider
* Black Widow spiders are not usually deadly, especially to adults, because they inject only a small amount of venom.
* The female Black Widow hangs belly upward and rarely leaves the web.
* The Black Widow is also called the “hourglass” or “shoe-button” spider.
* Black Widow is considered the most venomous spider in North America.

Genus: Latrodectus
Phylum: Arthropoda
Sub Phylum: Chelicerata
Class: Arachnida
Order: Araneae
Sub Order: Labidognatha
Family: Therididae
Species: 6
Source: http://www.desertusa.com/july97/du_bwindow.html

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Mystery Behind Farts

Posted in Uncategorized by wink on January 16, 2006

Did u know that farting releases methane gas into atmosphere? Methane gas is green-house gas so every time u fart, you are contributing to global warming and air pollution!
Before u environmental conservationists stop ur farts, note that farting regularly keeps u healthy, removes poisonous methane gas in ur bodies, u can actually get sick if u stop farting. A very wise person once told me that a healthy person should fart around 80 times/day!
A family remedy to cleanse our bodies off methane in times of indigestion is to eat a lot of either raw or toasted garlic. It really works! Only, try this when no one’s around as u’ll be stinking from both ends.

Farts can be useful:

Farts and other gases produced by rotting organic materials are called biogas. In the days before electricity, biogas was drawn from the underground sewer pipes in London and burned in street lamps, called gaslights. Biogas can be used as fuel for other things left to ur imagination!

What produces farts:

Everyone creates this gas as they digest food. Helpful/symbiotic bacteria called methanogen, in our bodies produce methane gas (farts) as they help digest food inside our anaerobic/oxygen-free intestine.