The Nebra sky disk; Mittelberg near Nebra (Germany); Special exhibition “Beyond the Horizon – ..
Rotation is inherent in the attractive forces between two parallel currents, as shown in this […]
Original plate illustrating Michael Faraday’s homopolar electric motor. Credit: Quarterly Journal ..
This chart, which can be purchased here, shows a supposed tree of evolution of religions […]
Comets – 彗星 Comets (彗星 Huìxīng) have been observed and recorded in China since the […]