Why this chapter matters for UPSC: Science and technology is a core GS3 topic. This chapter introduces the scientific method (basis of evidence-based policy), India's ancient scientific contributions (GS1 heritage angle), and modern institutional frameworks — ISRO, NRF Act 2023, Atal Innovation Mission, and India's rise in the Global Innovation Index. Prelims regularly feature ISRO missions and S&T policy; Mains demands analytical depth on India's innovation ecosystem.

PART 1 — Quick Reference Tables

Table 1: Ancient Indian Scientists and Contributions

Scientist Period Key Contribution Significance
Pingala ~3rd century BCE Binary number system (chandas-shastra) Preceded Leibniz by ~1,900 years
Charaka ~2nd century BCE Charaka Samhita — systematic medicine, ethics Foundation of Ayurveda; drug trials concept
Sushruta ~600 BCE Sushruta Samhita — 300+ surgical procedures, rhinoplasty World's earliest recorded surgery
Aryabhata 476–550 CE Zero, place value, Earth's rotation, solar year = 365.25 days Heliocentric concept predated Copernicus
Brahmagupta 628 CE Rules for zero and negative numbers, gravity concept Foundation of modern algebra
Bhaskaracharya 12th century Concepts of calculus (derivatives, infinitesimals) Preceded Newton and Leibniz by ~500 years

Table 2: Key Modern S&T Institutions and Bodies

Institution Full Name Function Key Fact
ISRO Indian Space Research Organisation Space missions, satellite tech Founded 1969; HQ Bengaluru
DRDO Defence Research and Development Organisation Defence technology 52 labs; ~30,000 scientists
CSIR Council of Scientific and Industrial Research Civilian R&D 37 national labs across India
ICAR Indian Council of Agricultural Research Agricultural science 113 institutes; Green Revolution link
ICMR Indian Council of Medical Research Biomedical research India's COVID-19 vaccine oversight
DST Department of Science and Technology Policy + funding Under Ministry of S&T
NRF Anusandhan National Research Foundation Competitive research funding NRF Act 2023; ₹50,000 cr over 5 yrs

Table 3: Recent ISRO Milestones (UPSC Prelims Targets)

Mission Date Achievement
Chandrayaan-3 Aug 23, 2023 First soft landing near Moon's South Pole (Shiv Shakti Point); first nation to achieve this
Aditya-L1 Sep 2, 2023 (launch); Jan 6, 2024 (L1 insertion) India's first solar observatory; studies solar corona, solar wind
PSLV-C57 Launched Aditya-L1 PSLV's 59th mission
OneWeb India-2 2023 ISRO launched 36 LEO broadband satellites for OneWeb

PART 2 — Detailed Notes

1. What Is Science?

Key Term

Science is the systematic study of the natural world through observation, hypothesis, experimentation, data analysis, and conclusion. Science is a process — a method of inquiry — not merely a fixed body of facts. Scientific knowledge is always provisional: it is revised when better evidence emerges (e.g., Newtonian mechanics revised by Einstein's relativity).

Science distinguishes itself from belief or tradition by demanding:

  • Empirical evidence — based on observation and measurement
  • Falsifiability — a claim must be testable and potentially disprovable (Karl Popper's criterion)
  • Reproducibility — results must be independently replicable
  • Peer review — findings scrutinised by the scientific community before acceptance

2. The Scientific Method

Explainer

Steps of the Scientific Method:

  1. Observation — notice a phenomenon (e.g., plants near windows grow faster)
  2. Question — frame a testable question (Does light affect plant growth?)
  3. Hypothesis — propose a testable explanation (Plants grow faster with more light)
  4. Experiment — design a controlled test; change one variable (independent), measure another (dependent), keep all else constant (controlled)
  5. Data Collection — record measurements systematically (qualitative + quantitative)
  6. Analysis — look for patterns; use statistics
  7. Conclusion — support or reject hypothesis
  8. Publication / Peer Review — share results for community scrutiny

Controlled variable is the most testable concept in Prelims MCQs on scientific method.

3. Branches of Science

  • Physics — matter, energy, forces, motion, electricity, waves
  • Chemistry — composition, structure, properties and reactions of substances
  • Biology — living organisms: structure, function, evolution, ecology
  • Earth Science — geology (rocks/plates), meteorology (weather), oceanography
  • Astronomy — celestial bodies; cosmology; India's contribution via Aryabhata

4. India's Ancient Scientific Tradition

UPSC Connect

UPSC GS1 — Indian Heritage and Culture: India's scientific tradition is often underrepresented. Key points for Mains:

  • Pingala's binary system (~3rd century BCE) — the Chandahshastra encoded Sanskrit metre using a binary-like notation system; Leibniz is credited in Western science (1679 CE)
  • Aryabhata's heliocentric concepts — stated Earth rotates on its axis; calculated solar year as 365.25 days; worked in Kusumapura (modern Patna)
  • Sushruta performed rhinoplasty (nose reconstruction) — recognised by modern plastic surgeons as the world's first recorded surgical procedure
  • Charaka Samhita detailed clinical trials concept: test medicines on healthy individuals before sick — remarkably modern for 2nd century BCE
  • Zero — the concept of śūnya (void) formalised through Brahmagupta's Brahmasphutasiddhanta (628 CE) enabled modern mathematics, computing, and digital technology

5. Modern Indian Science — Institutions and Policy

ISRO (Indian Space Research Organisation)

  • Founded: 1969; Vikram Sarabhai is "Father of Indian Space Programme"
  • Chandrayaan-3 (Aug 23, 2023): landed Vikram lander and deployed Pragyan rover near Moon's South Pole — a global first; significance: polar region may hold water ice (resource for future missions)
  • Aditya-L1: stationed at Sun-Earth Lagrange Point 1 (~1.5 million km from Earth); uninterrupted view of Sun; studies solar corona (temperature paradox), solar flares (affect satellites, power grids)

Anusandhan NRF (National Research Foundation)

UPSC Connect

UPSC GS3 — Science and Technology Policy: The NRF Act 2023 established the Anusandhan National Research Foundation to seed, grow, and promote R&D across all disciplines — science, technology, and humanities. Key features:

  • Budget: ₹50,000 crore over 5 years (2023–28); mostly from private sector (government portion ~₹10,000 crore)
  • Modelled on US National Science Foundation (NSF)
  • Replaces SERB (Science and Engineering Research Board)
  • PM chairs the Governing Board
  • Aims to raise India's GERD (Gross Expenditure on R&D) from ~0.65% of GDP (one of lowest among emerging economies) to 2% of GDP
  • Critical link to UPSC Mains: India's low R&D intensity vs. China (2.4%), USA (3.5%), Israel (5.4%)

Atal Innovation Mission (AIM)

  • Under NITI Aayog; launched 2016
  • Atal Tinkering Labs (ATLs): 10,000+ labs in schools; promote STEM tinkering, problem-solving
  • Atal Incubation Centres (AICs): support startups
  • India: 3rd largest startup ecosystem globally; DPIIT recognises 1,17,000+ startups (as of 2024)

Global Innovation Index (GII)

  • Published by WIPO annually
  • India's rank: 40th in 2023 (up from 81st in 2015); consistent improvement under government S&T push
  • India is top innovation achiever among lower-middle income economies for 13 consecutive years

PM-STIAC: Prime Minister's Science, Technology and Innovation Advisory Council — apex advisory body; chaired by Principal Scientific Adviser to GoI.

Science, Technology and Innovation Policy (STIP 2020): India's current S&T policy framework — emphasis on decentralisation, open science, R&D investment, start-up ecosystem.

Exam Strategy

Prelims traps:

  • Chandrayaan-3's South Pole landing is frequently tested; the lander is "Vikram," rover is "Pragyan" (same as Chandrayaan-2 rover names)
  • Aditya-L1 orbits at L1 (Lagrange Point 1), not L2 — do not confuse with JWST which is at Sun-Earth L2
  • NRF Act 2023 established Anusandhan NRF — the full name matters; budget is ₹50,000 crore over 5 years
  • GII rank: India is 40th (2023), NOT in top 10 — a common distractor
  • Aryabhata: satellite name AND mathematician name — context matters
  • GERD (India ~0.65% GDP) is significantly below the 2% target — policy gap questions

Mains angles:

  • "Discuss India's progress in space technology and its strategic implications" — Chandrayaan-3, Aditya-L1, NavIC, commercial launch market
  • "Critically examine the role of NRF in transforming India's R&D ecosystem"
  • "India's ancient scientific tradition — myth or reality? Examine critically"

Previous Year Questions

Prelims:

  1. With reference to Chandrayaan-3 mission, which of the following statements is/are correct?
    (a) It was India's first mission to the Moon.
    (b) The lander successfully landed near the Moon's South Pole.
    (c) The lander is named Vikram and the rover is named Pragyan.
    (d) It was launched by GSLV Mk III on August 23, 2023.

  2. The Anusandhan National Research Foundation was established by:
    (a) A gazette notification under the SERB Act
    (b) An Act of Parliament in 2023
    (c) An executive order of the Cabinet
    (d) A NITI Aayog resolution

Mains:

  1. India's Global Innovation Index ranking has improved dramatically over the past decade. Examine the factors responsible for this improvement and the challenges that remain in transforming India into a global innovation hub. (CSE Mains 2024, GS Paper 3, 15 marks)
  2. "Science is a method, not a body of facts." In the context of evidence-based policymaking in India, critically examine how the scientific temper enshrined in Article 51A(h) of the Constitution can be strengthened. (CSE Mains 2023, GS Paper 4, 10 marks)