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Oliver Sacks was a neurologist who brought the brain to popular imagination in latter part of the 20th century. In the article, the author presents Sacks’s work on brain phenomena, ranging from hallucinations and colour blindness, against the  backdrop of his life that was as interesting as the brains and people he studied. Also highlighted is Sacks’s remarkable ability to connect with and communicate about his ‘patients’ in a very humane way.

Kriti Gupta

Khilendra Kumar

Are you looking for a book that offers a fun, new perspective to science? In this review, join a mother and son as they share their experiences of one such book, called The Agenda of the Apprentice Scientist.

Jyotsna Lall and Hyder Mehdi Rizvi

Joyeeta Banerjee

Aims of ‘connecting’ as a strategy

Jagmohan Singh Kathait

Gomathy Ramamoorthy

The whole of plane geometry is based on two figures, the straight line and the circle. Both these figures are defined by two points, say A and B. For drawing these figures, two instruments are available: (i) an unmarked straight edge for drawing a straight line joining A and B and, if necessary, extending the straight line beyond the segment AB on both sides; (ii) a compass for drawing a circle with one of the points A (or B) as centre and passing through the other point B (or A).

In this short note, we present a proof of the generalised Pythagoras theorem. We use the ‘ordinary’ Pythagoras theorem for the proof.

Theorem. In any triangle ABC, we have:

AC2 + BC2 > AB2 <--> C < 90 ,

AC2 + BC2 < AB2  <--> C > 90◦ .


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