All pictures above taken from this site: these guys have built many impressive oven stoves, check them out.
Back to article "Sunbathing in the living room: oven stoves and heat walls"
From the earliest civilisations right up to the start of the Industrial Revolution, humans used sheer muscle power, organisation skills and ingenious mechanics to lift weights that would be impossible to handle by most power cranes in operation today.
We don't need better batteries, we need better cars.