1670 in science

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.