The phenomenon of colour was first discovered by Sir Isaac Newton. He proved that sunlight comprised several colours. He passed a beam of sunlight through a prism and discovered that the white light ray is a mixture of many colours. Without light, there is no colour. So, colour isn’t in the objects that we see […]
• Common name : Apricot • Scientific name : Prunusarmeniaca • Family : Rosaceae • Native land : China, Armenia or Siberia Apricot is a hardy, medium-sized deciduous tree. The fruits are often categorised as ‘stone fruits’ because of the stony seeds. The leaves are broad and roundish, with a pointed apex. The fruit ripens
• Common name : Spreading Dogbane • Scientific name : Apocynumandrosaemifolium • Family : Apocynaceae • Native land : North America It is a perennial herb. The bloom season starts from June and ends by August. The flowers are bell-shaped, pink to white with pink stripes on the inside. Each flower has five flaring lobes
Optical illusion is a trick played by our eyes on us. When we see an object, the actual image detection is done by our brain. The cells in the brain are the real decision makers about what the eyes are seeing. In case of an optical illusion, the brain sees things which may or may
• Common name : Anise, Star Anise • Scientific name : Illicuimverum • Family : Schisandraceae • Native land : North-East Vietnam and South-West China It is a medium-sized native evergreen tree. Star Anise is so named from the stellate form of its fruit. The star-shaped fruits are picked just before ripening and dried before
• Common name : Wood Anemone • Scientific name : Anemone nemorosa • Family : Ranunculaceae • Native land : Europe It is one of the first spring flowers appearing in March and April. It is a perennial and spread by means of underground roots. The deeply-cut leaves and star-like flowers rise directly from it
• Common name : Willow Blue Star • Scientific name : Amsoniatabernaemontana • Family : Apocynaceae • Native land : North America, East Asia and the Eastern Mediterranean It is a perennial plant, first discovered in 1788. It is found in wooded areas and on riverbanks. It blooms in May and June. Each flower has
Thoughts are impulses that originate from our brain. The speed of these impulses cannot be measured accurately; however, it has been calculated that thoughts travel at a speed of 241 km per hour. This speed is lower than the speed of messages conveyed through television, email, etc. The speed of thought varies according to the
• Common name : American Lotus, Yellow Lotus • Scientific name : Nelumbolutea • Family : Nelumbonaceae • Native land : Eastern North America It is an herbaceous flowered aquatic perennial with large circular leaves. It is commonly found in lakes and swamps, as well as areas subject to flooding. Flowering begins in late spring
• Common name : Saskatoon, Juneberry • Scientific name : Amelanchieralnifolia • Family : Rosaceae • Native land : North Western and North Central & North America The city, Saskatoon (in Saskatchewan, Canada) is named after the berry. It is a perennial deciduous shrub. The ripe juneberry fruit is dark purple, with several tiny soft
Daydreaming is dreaming with open eyes. Almost everybody daydreams. Daydreams are usually an expression of desires, ambitions, wants or needs. The dream gives us the chance to accomplish, in our thoughts, something that we want to do or want to get. In other words, daydreaming is an outlet for our innermost feelings and thoughts. At
Birthmarks are coloured marks on the skin that are noticeable at birth, or shortly afterwards. There are two types of birthmarks: pigmented and vascular. Pigmented birthmarks are caused by clusters of pigment cells; they are usually tan or brown-coloured. Vascular birthmarks are caused by abnormal blood vessels in or under the skin; they are often
• Common name : Western Ragweed • Scientific name : Ambrosia psilostachya • Family : Asteraceae • Native land : North America, nearly all of the continental United States, and the Northern half of Mexico It is a perennial herb. It grows like a slender, branching, straw-coloured stem to a maximum height near two metres,
• Common name : Tampala • Scientific name : Amaranthustricolor • Family : Amaranthaceae • Native land : South Central Mexico It is an annual or short-lived perennial plant. Amaranth now has worldwide distribution. The amaranth plant is a grain and greens crop plant. The plant develops long flowers, which can be upright or trailing
A person goes through various stages of physical and mental growth. All children have different physical stature and strength. They also have different levels of mental development. To measure an individual’s mental level of development, a series of tests have been made. These tests are called IQ (relative intelligence of a person) tests. ‘IQ’ is