A new axe design has taken full advantage of known physics to chop the time it takes to split up a log of wood. Finnish inventor Heikki Kärnä is the man behind the Vipukirves Leveraxe and his aim was to redesign the axe using simple principles of physics to make it more efficient and safer.
https://interestingengineering.com/culture/physics-exploiting-axe-splits-wood-in-record-time