Water is colourless. But when we observe any large water body, it appears blue. When it has a lot of impurities (or nutrients), it can vary from red, green, white, grey, brown, black to anything that is weird and filthy. Read about some important terms related to different colours of water that we come across in common parlance or which researchers use to understand better this elixir of life. Bluewater: ‘Why is water blue in colour?’—humans must have raised this question since time immemorial. But in 1921, this query was resolved when Sir CV Raman raised and answered it successfully...
From privileges for a few to rights for all There was a time, not so long ago, when the so-called ‘civilised’ world was divided into free humans and slaves. Free humans were those who had the right to own property while the slaves were those who were considered as property. Free humans had the privilege to make decisions not only for themselves but also for their slaves. As we learnt from others who we thought were less civilised than us...