CAN A SPIDER GET CAUGHT IN THE WEB OF ANOTHER SPIDER?

Yes, spiders get caught in the webs of other spiders frequently. And it isn't usually a pleasant experience for them. 

Theoretically, they might well be able to navigate another spider's web skilfully, but they are rarely given the choice. Spiders attack other spiders and if anything, spiders from the same species are more likely to attack each other than spiders of other species.

Most commonly, a spider will grasp and bite its intended victim and inject venom. Karen Yoder of the Entomological Society of America explain, "Paralysis from the bite causes them to be unable to defend themselves and eventually they succumb to or become a meal!"

The main enemies of spiders are spiders themselves. But not all spiders attack their own. There are about 20 species of social spiders that live together peacefully in colonies.

Reader's Digest: Imponderables
Photos: Google Images

WHY LEAVES ARE GREEN

In the animal world there are many different colours. There are orange and brown giraffes, white polar bears, blue beetles and red and yellow birds. But in the plant world, the leaves of nearly all plants are just one colour - green. Why?

The biggest difference between plants and animals is that animals eat other things for their food and plants don't. Plants are able to make their own food. Leaves have a wonderful substance inside them that makes food out of air and water, with the help of sunshine. This substance is called chlorophyll. And chlorophyll is green.

So a healthy leaf is green because it is filled with chlorophyll. Leaves which don't get enough light turn pale and yellowish because the chlorophyll can't work without sunlight.

(World Book Encyclopedia: Green Kingdom)