Vigyan

**Vigyan (Science)** uu chij hae jon hamlog kartaa hae prakritik (natural) dunia ke baare me jaane ke khaatir. Dher rakam ke vigyan hae. Prakritik vigyan (Natural sciences) prakriti aur bhautik (physical) dunia ke adhyan kare hae. Isme hae rasayan vigyan (chemistry), jiu vigyan (biology), geology, taara vigyan (astronomy), aur bhautik vigyan (physics). Samaajik vigyan (Social sciences) log aur samaj kaise chale hae, ke adhyan kare hae.   Isme hae, manovigyan (psychology), samaj vigyan (sociology], aur arthsaatr (economics). Applied vigyan, vigyan se sikha gias chij ke kaam me laae ke samasya ke hal kare hae (solve problems). Isme hae, engineering aur doctori (medicine). Vigyan mathematics, computer science aur logic ke kaam me laawe hae, jiske kabhi-kabhi "formal sciences" bola jaawe hae. Vigyan nigrani rakkhe hae (makes observations) aur parikchhan (experiments) kare hae. Vigyan, thiik sachchaai (accurate facts) , vigyanik niyam, aur theories ke banae hae. 'Science' dher gyan jiske ii process me paawa gais hae ke bhi bolaa jaawe hae.

Jaanch partaal (Research), vigyanik tarika (scientific method) ke kaam me laawe hae. Vigyanik praikchhan, anumaan (hypotheses) ke kaam me laawe hae, jon pahile ke gyan aur bichaar pe based hae, jiske dher topic me baata jaawe sake hae. Tab ii bichaar ke parikchhan se jaanch karaa jaawe hae.  Jon log vigyan ke adhyan aur jaanch kare hae ke vigyanik bola jaawe hae. Vigyanik chij ke adhyan kare hae iske achchhaa se dekh ke, naap ke aur parikchhan kar ke. Vigyanik kosis kare hae ii sanjhaawe ke ki chij kaahe ek rakam chale hae aur predict kare hae ki aage kon chij hoi. 

Vigyan ke itihaas hajaaro saal puraana hae. Aadhmik vigyan ke suruwaat  puraana Egypt aur Mesopotamia (lagbhag 3000–1200 BCE) me paawa jaawe hae. Uu log maths, taara vigyan, aur doctori ke bichaar ke suruu kare rahin. Uu log ke asar  Greeks pe parraa rahaa, jon dunia me kon chij hoe hae ke samjhaawe ke kosis kare rahin natural causes ke kaam me laae ke. Baad me India’s Golden Age me, aur pragati bhais rahaa. Jisme  Hindu–Arabic number system ke banaana, bhi hae.

Jab Western Roman Empire khalaas hoe gais Early Middle Ages (400–1000 CE) me, tab Europe me vigyanik prgriti kamti hoe gais. Lekin kuch-kuch jamaana me pragati fir se bhais. Islamik dunia me gyaani log Greece ke science ke adhyan kar ke iske Islamic Golden Age me aur achchhaa kar diin. baad me, jaise Byzantine Empire kamjor parraa, hian ke gyaani log  Greek books ke Western Europe laegain, jisse Renaissance suruu bhaisrahaa.

10th se 13th century talak, Europe, Greek aur Islamic vigyan ke fir se sikhis. Isse 16th century me scientific revolution suruu bhais. Science began to change a lot. New discoveries removed old ideas. Vigyanik tarika aur  important bhais.  19th century talak, vigyan aur professional aur organized bhais rahaa. Iske  “natural philosophy”, bole ke jagha “natural science” bola jaawe lagaa.

## Itihaas
### Prehistoric science

Prehistoric science me Palaeolithic, Mesolithic, aur Neolithic ages hae, jon lagbhag  2.5 million saal talak rahaa, 3000 BCE talak. Jab ki ii jamaana ke kosis  "vigyan" nai rahaa jaise aaj-kal hamlog jantaa hae, uulog achchhaa se observation, experiments, karat rahin aur ii time   organized thinking suruu bhais rahaa. Ek sab se pahila aur khaas, uu time ke vigyan rahaa, patthar ke aujaar ke banaana. Ii  Homo habilis se suruu bhais rahaa aur baad ke sanskriti me chalte rahaa, jaise   Acheulean, Mousterian, aur Upper Paleolithic log. Log ii time aujaar jaise tangaari, scraper, chhed banae waala aur spear tip banaawat rahin. Iske kare ke khaatir uulog ke ii samjhe ke parrat rahaa ke patthar ke kaise tuura jaawe hae, kon rakam ke paththarr sab se achchhaa rahe hae aur iske kaise thiik force se maara jaawe sake hae.  Archaeologists (scientists who study ancient human history) ii sabuut paain hae ki ii puraana insaan trial and error se sikhe rahin, aur ii jaankari ke duusre se share kare rahin. Jaise time pass bhais, ii log aapan aujar ke aur achchhaa kar ke iske aur tagrraa banae rahin.  Ii rakam ke  hands-on sikhna aur ii jaan kari ke duusre ke dena, vigyan ke kaam me laaae ke problem ke solve kare ke namuuna hae, khaas kar ke materials ke samajhna aur iske kaise kaam me laana, jiske aaj-kal  materials science bola jaawe hae.

Puraana jamaana ke insaan ke lage  taara vigyan ke kuchh jaankaari rahaa, aasmaan ke adhyan.  Iske archaeological discoveries me dekha jaawe hae, jaise  Blanchard bone (lagbhag 30,000 BCE) aur Lascaux Cave paintings (lagbhag 17,000 BCE). Ii chij aur chhaapa dekhae hae ki puraana insaan chandarma ke phases ke dekhat rahin aur taara ke jhund ke recognise karat rahin, jaise Pleiades constellation. Ek sab se puraana aasmaan dekhe waala structure  Nabta Playa hae, patthar ke circlesouthern Egypt me, jiske lagbhag 6000 BCE me banaawa gais rahaa. Ii ek sab se puraana namuuna hae jisme log barraa-barra patthar ke   summer solstice sunrise se line kare hae, saal ke sab se lambaa din.  Isse mausam ke barsaat pe bhi nigraani rakkhaa jaawat rahaa , jon huura jagha me rahe ke khaatir jaruri hae. Ii viyan aur taara vigyan ke taraf ek khaas kadam rahaa. 

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