Science & Technology

VISHNUTEERTH AGNIHOTRI & ANAGH PURANDARE

A not-quite-procedure for not-really-an-experiment for chemistry educators.
 
 
Procedure
In early April this year, newspapers and online websites were agog with the news that astronomers had obtained the first image of a black hole known to reside in a distant galaxy called M87. Why did this image cause such a stir?
 
Fig. 1. The image of a ‘black hole’ at the heart of galaxy M87.

This article presents a few simple activities, with handmade toys and optical illusions, that explore ways in which our brain and eyes work together to perceive the world.

The simple and everyday practice of curd formation involves concepts taught in biology (microbial fermentation), chemistry (conversion of milk lactose to lactic acid) and physics (coagulation of milk proteins with acid). Can we use this process to offer a hands-on introduction to what it means to think like a scientist?
 
Deepti Trivedi
 

SHREYA GHOSH

JOYSHREE CHANAM

GEETHA RAMASWAMI

Evolution is a difficult concept to grasp. The earliest explanation offered for our existence, usually by an elder in the family, is that ‘we were created by a higher power’. This explanation is often accompanied by descriptions of fantastical beasts and awe-inspiring natural phenomena that seem easier to explain as the whimsy of an all-powerful being.

There are 7 billion people, more than 100 trillion ants, and more than a billion honey bees in the world. Where did all this diversity come from? How did we evolve - what’s the human story? In this article, the author explores some of the ways in which we’ve tried to answer these questions.
 

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