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The year 1670 in science and technology involved some significant events.
Botany
- John Ray publishes Catalogus plantarum Angliæ, the basis of all later floras of England.
- The predecessor of the Royal Botanic Garden Edinburgh is opened as a physic garden by Drs Robert Sibbald and Andrew Balfour in Holyrood, Edinburgh, Scotland.
Earth sciences
- Jean Picard calculates the Earth radius to within 0.44% of the modern value.
- Agostino Scilla publishes ' ("Vain Speculation Undeceived by Sense") in Naples, arguing for an organic origin for fossils.
Technology
- The first longcase clock is built in England by William Clement.
Births
- February 25 – Maria Margarethe Kirch born Winckelmann, German astronomer (died 1720)
Deaths
- March 10 – Johann Rudolf Glauber, German chemist (born 1604)
- May 21 – Niccolò Zucchi, Italian astronomer (born 1586)