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Most of us are familiar with the basic principles of an allergic reaction - and at a simple level, it's not a very difficult process to understand. Allergies are basically abnormal responses of our body's immune system to an allergen - a substance that occurs naturally in our environment and which is harmle... |
16 May 2008
05:36 GMT |
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The spring, when nature blooms, pollen is everywhere in the air. It is the curse for the allergic people, experiencing the "hay fever". But what's the pollen? The product of the male part of the flowers (stamins), in other words, plant sperm. For a plant to reproduce, the pollen must reach the pistil on the fema... |
27 November 2007
11:00 GMT |
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You may not like flowers, but if you like vanilla, you actually like ... orchids. Vanilla is the only comestible orchid and the vanilla stick is nothing else than the fermented and blackened pod of an orchid, Vanilla planifolia that is to be found in Mexico. (in fact "vanilla" means "little pod" in Spanish). Did you ... |
17 November 2007
04:02 GMT |
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In the field of sex, nature got very imaginative with the plants. Sexual organs of the plants, or flowers, are extremely diversely organized: they can be male or female, or have a hermaphrodite structure. Depending on species, an individual can carry hermaphrodite flowers, or only males, or only females, or a combina... |
1 May 2007
10:13 GMT |
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We know that flowers are pollinated by bees, butterflies, hummingbirds, sunbirds, white-eye birds, pollen-eating bats. And pollinators use to fly. But a pollinating lizard? Yes, they do exist, and on the island of Mauritius (in the Indian Ocean), the blue-tailed day gecko is the key factor in the survival of the nat... |
24 April 2007
03:10 GMT |
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They may not have watched TV and drunk beer in America 7,300 years ago, but they indulged on popcorn, as a new research at Florida State University revealed. That's the approximate age when ancient Mexicans started to cultivate the base of their cuisine, 1,200 years earlier than previously believed.The team lead... |
11 April 2007
04:57 GMT |
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