Critical articles and essays about science, math, and history of science

• The Story of Euclid

• The origins of the theory of the Hollow Earth

• The curious infinite of Jorge Luis Borges

• The vengeance of Galileo

• The subterranean world of Edmund Halley

• The fourth dimension as seen from Flatland

• Bernard Fontenelle's obsession with life on the Moon

• About how A. T. Schofield found the fourth dimension in the Bible

• The strange extraterrestrial worlds of Camille Flammarion

• The coordinates of the fourth dimension

• What do you know about the hollow Earth and the hollow Moon?

• What do you know about the fear of comets?

• Three unexpected behaviors of the infinite

• What do you know about the pyramid inside the Moon?

• What do you know about the first burial on the Moon?

• What do you know about the Moon Trees?

• Where does infinity begin?

• Is it really possible to generate a plane by moving a straight line perpendicular to itself?

• The Eddington’s number: a case of scientific arrogance?

• One million random digits

• Some myths about the infinite

• Some myths about the infinite, part 2

• The fourth dimension as seen from Flatland

• The Book of Sand of Borges and the Continuum of Cantor

• Historical quotations about prime numbers

• Quaternions and transcomplex numbers

• The imaginary numbers are not so imaginary and the complex numbers are not so complex