1. Editorial

   • G. Nagendrappa

   EditorialNotes Pages: 1 - 2

2. The Wright brothers and their first flight

   • O. N. Ramesh

   Departments Pages: 3 - 4

3. The Wright family

   • R. Narasimha

   Departments Pages: 5 - 5

4. Geologic and climatic puzzle of the Proterozoic snowball earth

   • P. V. Sukumaran

   General Article Pages: 8 - 17

5. Markov Chain Monte Carlo methods

   • K. B. Athreya
   • Mohan Delampady
   • T. Krishnan

   General Article Pages: 18 - 32

6. Frobenius and his Density theorem for primes

   • B. Sury

   General Article Pages: 33 - 41

7. RNA Interference —Towards RNA becoming a medicine

   • Subhanjan Mondal

   General Article Pages: 42 - 49

8. Powered Hang gliding

   • Vidyadhar Y. Mudkavi

   General Article Pages: 50 - 60

9. How two bicycle mechanics achieved the world’s first powered flight

   • Roddam Narasimha

   General Article Pages: 61 - 75

10. Sage Bharadvaja’s Vimana Prakarana

    • Manu

    General Article Pages: 76 - 76

11. A Simple and Illustrative Method of Iron-Exchange Chromotography

    • B. Ramachandra Murty

    Departments Pages: 77 - 82

12. Planetary orbits as simple harmonic motion

    • Bikram Phookun

    Departments Pages: 83 - 91

13. Errata

    • Sourav Das

    Erratum Pages: 91 - 91

14. Errata

    • Soubhik Chakraborty

    Erratum Pages: 91 - 91

15. New Insights into Obesity

    • D. D. Bansal
    • Ravneet Kaur Boparai

    Research News Pages: 92 - 93

16. How we invented the Airplane

    • C. S. Yogananda

    Book Review Pages: 94 - 98

17. Some Aeronautical experimemts

    • Wilbur Wright

    Departments Pages: 99 - 114