हर पल को फोटो फ्रेम में कैद करके सालों तक संजो कर रखना कितना अच्छा लगता है और आजकल तो…
माइक्रोस्कोप का इस्तेमाल ज्यादातर लेबोरेटरी में किया जाता है. इसका इस्तेमाल किसी भी सूक्ष्म वस्तु को देखने के लिए किया…
Nicknamed corduroy road, Log-laid Roads consist of whole logs, or logs split down the middle, that is laid across the…
We may not make direct use of adhesives every day. But glue is an important component of many common manufactured…
China's grand canal completed in the thirteenth century and stretching almost 1,200 miles (1, 930 km) from northern Beijing to…
Although it is common knowledge that rowboat was used as far back as 3000 B.C.E. in Egypt as a means…
The Development of pastes designed to clean teeth and freshen the breath began in Egypt as early as 5000 B.C.E…
Plaster goes by various names- plaster of Pairs, Partly dehydrated gypsum, or calcium sulfate hemihydrate. Gypsum is a common mineral…
Around 9500 B.C.E. in a number of populations distant from one another people began to select and cultivate plants for…
More than a million years ago members of the species homo erects were making stone tools designed for chopping that…