ROUNDSTUBE/aven1961

128th Video of ROUNDS TUBE is about the International Day of Forests that falls on 21st March - The year 2011 was declared the International Year of Forests by the United Nations to raise awareness and strengthen the sustainable management, conservation and sustainable development of all types of forests for the benefit of current and future generations. The theme for 2021 is “Forest restoration: a path to recovery and well-being”. This year's theme aims to emphasise how restoration and sustainable management of forests can help address climate change and biodiversity crisis. Forests are a Breath of Fresh Air 2) Forests are Home Sweet Home 3) Forests Keep Things Cool 4) Forests Help in the Fight Against Climate Change! 5) Forests Give Us Lots Things 6) Forests Clean Water 7) Forests Help the Soil Stay Put 8) Forests Give Us a Way of Life 9) Forests are Good for the Soul and 10) Forests Always Draw a Crowd. The importance of forests cannot be underestimated. We depend on forests for...

127th Video of ROUNDS TUBE is about - World Sparrow Day which is celebrated on March 20 every year. It a day to raise awareness and protect the common house sparrows, which are not so commonly seen now due to increasing noise pollution. The theme for WORLD SPARROW DAY is I LOVE Sparrows. The theme has been inspired by the hope that more and more of us will celebrate the relationship between PEOPLE AND SPARROWS. After all, we've lived in close harmony with these adorable little birds for 10,000 years. World Sparrow Day is a day designated to raise awareness of the house sparrow and then other common birds to urban environments, and of threats to their populations, observed on 20 March.It is an international initiative by the Nature Forever Society of India in collaboration with the Eco-Sys Action Foundation (France) and numerous other national and international organisations across the world. The Nature Forever Society was started by Mohammed Dilawar, an Indian conservationist who s...

A kaleidoscope (/kəˈlaɪdəskoʊp/) is an optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection. The reflectors (or mirrors) are usually enclosed in a tube, often containing on one end a cell with loose, colored pieces of glass or other transparent (and/or opaque) materials to be reflected into the viewed pattern. Rotation of the cell causes motion of the materials, resulting in an ever-changing view being presented. Kaleidoscope, optical device consisting of mirrors that reflect images of bits of coloured glass in a symmetrical geometric design through a viewer. In 1814 Sir David Brewster conducted experiments on light polarization by successive reflections between plates of glass and first noted "the circular arrangement of the images of a candle round a center, and the multiplicatio...

Rudraksha is a seed that is used as a prayer bead in Hinduism (especially in Shaivism). When they are ripe, rudraksha seeds are covered by a blue outer fruit and are sometimes called blueberry beads. The seeds are produced by several species of large, evergreen, broad-leaved tree in the genus Elaeocarpus, the principle of which is Elaeocarpus ganitrus. The seeds are associated with the Hindu Lord Shiva and are commonly worn for protection and for chanting mantras such as Om Namah Shivaya (Devanagari: ॐ नमः शिवाय Om Namaḥ Śivāya). The seeds are primarily sourced from India, Indonesia and Nepal for jewellery and malas; they are valued similarly to semi-precious stones. Various meanings and interpretations are attributed to the beads with different numbers of segments or the locules of seed (mukh) [Sanskrit "मुख": face ], and rare or unique beads are highly prized and valuable. Rudraksha is a Sanskrit compound word consisting of Rudra (Sanskrit: रुद्र) and akṣa (Sanskrit: अक्ष)....

Space technology is technology developed by space science for use in astronautics, for purposes such as spaceflight or space exploration. Space technology includes spacecraft, satellites, space stations, and support infrastructure equipment, and procedures and space warfare. After World War II, the United States and the Soviet Union created their own missile programs. On Oct. 4, 1957, the Soviets launched the first artificial satellite, Sputnik 1, into space. Four years later on April 12, 1961, Russian Lt. i) Mars Reconnaissance Orbiter ii) Hubble Space Telescope iii) Kepler Spacecraft iv) WISE and NeoWISE Probe v) Curiosity vi) Spirit and Opportunity Rovers vii) SELENE Lunar Orbiter viii) Cassini-Huygens Probe ix) SpaceX's Falcon 9 Rocket and x) International Space Station. Cassini-Huygens Probe. The Cassini-Huygens mission is a joint effort between NASA and ESA. ... Differrent types of greatest space technologies of 21st Centure are as follows: The ultimate purpose of going into...