90 year-old artist Takis, a pioneer sculptor whose influential works using electromagnetism allowed art to turn invisible physical forces into visible, is being honoured with two tribute exhibitions, one in Paris (February 18 to May 17) and another one in Houston, Texas (February 18 to July 26).

The Paris exhibition at the Palais de Tokyo is called Magnetic Fields and pays tribute to the artist "who sent a man into space six months before Yuri Gagarin during a famous performance, and created a monumental basin of light signals on the esplanade of La Défense in 1988 which thousands of people see every day."

The Houston exhibition is hosted by the Menil Collection and is called "The fourth dimension" to highlight the hidden dimension which Takis has continually sought since the mid-1950s, through aesthetic experiments which incorporate invisible energies as a fourth element.

Born Panagiotis Vassilakis in Athens in 1925, Takis is world-renowned for his explorations of the gap between art and science. Currently, he runs the Research Center for the Arts and Sciences in Athens.