Prague Orloj, 16th Century Astronomical Clock, on the Old Town Hall in Old Town Square, Prague, Czech Republic

Scorpio Stairway and behind the Brihat Samrat Yantra Pisces astrological sign at The Observatory in Jaipur, Rajasthan, India

Scorpio Stairway and behind the Brihat Samrat Yantra Pisces astrological sign at The Observatory in Jaipur, Rajasthan, India

The Nadivalaya Yantra equatorial instrument at Jantar Mantar, The Observatory in Jaipur, Rajasthan, Northern India

The Nadivalaya Yantra equatorial instrument at Jantar Mantar, The Observatory in Jaipur, Rajasthan, Northern India

Observation deck of The Giant Sundial, Samrat Yantra, The Supreme Instrument, at The Observatory in Jaipur, Rajasthan, India

The Observatory in Jaipur, Rajasthan, India

Scorpio Stairway and behind the Brihat Samrat Yantra Pisces astrological sign at The Observatory in Jaipur, Rajasthan, India

The Observatory in Jaipur, Rajasthan, India

Observation deck of The Giant Sundial, Samrat Yantra, The Supreme Instrument, at The Observatory in Jaipur, Rajasthan, India

Observation deck of The Giant Sundial, Samrat Yantra, The Supreme Instrument, at The Observatory in Jaipur, Rajasthan, India

Prague Orloj, 16th Century Astronomical Clock, on the Old Town Hall in Old Town Square, Prague, Czech Republic

Students on a visit to The Observatory walk around the stone instruments in Jaipur, Rajasthan, Northern India

Hand in a sterile glove placing a tube of blood in a mixer in a laboratory

Pressure gauge, above 3000 bar, cold-cutting process with high pressure water jet technology, test series in the Underwater Technology Centre at the Leibniz University Hannover, manufacture of bone screws for medical applications, with over 3000 bar press

Nebra ark, museum for the Nebra sky disk, Nebra, Saxony-Anhalt, Germany, Europe

Nebra ark, museum for the Nebra sky disk, Nebra, Saxony-Anhalt, Germany, Europe

Recorder of a measuring instrument, red and blue lines on milimeter paper, system work-shop in the Max-Planck-Institute for radio astronomy, Bad Muenstereifel-Effelsberg, Eifel, North Rhine-Westphalia, Germany, Europe

Adjustment of a laboratory instrument

Tek (Trimix) speleologist diver in a karstic underwater cave over 70 meters deep, Photogrammetry, twiglight zone, Mayotte

Earth diluted with water in order to extract the PH from the soil as part of a study on nitrogen exchanges between bacteria and the roots of legumes in the tropical forest of the "La Selva" research station in Puerto Viejo from Sarapiqui, Costa Rica

Tara Oceans Expeditions - May 2011. CTD-Rosette (Conductivity Temperature Density instrumental platform with 7 additional sensors), galapagos

Installation of an acoustic recorder for the study of the frequentation and impact of acoustic diving, in the Natural Marine Reserve of Cerbere-Banyuls, Pyrenees-Orientales, Occitania, France

Tara Oceans Expeditions - May 2011. CTD-Rosette (Conductivity Temperature Density instrumental platform with 7 additional sensors)

Instrument for measuring soil humidity at research station ?La Selva? in Puerto Viejo de Sarapiqui, Costa Rica

Researcher measuring the beak of a Rufous-tailed hummingbird as part of a pollination study, rainforest at the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

Earth diluted with water in order to extract the PH from the soil as part of a study on nitrogen exchanges between bacteria and the roots of legumes in the tropical forest of the "La Selva" research station in Puerto Viejo from Sarapiqui, Costa Rica

European pond turtle (Emys orbicularis) Measurement and weighing of a , Brenne, France

3 microscope slides to analyze pollen transported on bat hairs, "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

European pond turtle (Emys orbicularis) Measurement and weighing of a , Brenne, France

European pond turtle (Emys orbicularis) Measurement and weighing of a , Brenne, France

Tara Oceans Expeditions - May 2011. CTD-Rosette (Conductivity Temperature Density instrumental platform with 7 additional sensors), Galapagos

Tara Oceans Expeditions - May 2011. CTD-Rosette (Conductivity Temperature Density instrumental platform with 7 additional sensors), Galapagos

Tara Oceans Expeditions - May 2011. CTD-Rosette (Conductivity Temperature Density instrumental platform with 7 additional sensors), Galapagos