The concept of photosynthesis was first explored by Dutch physician Jan Baptista van Helmot in 1648 during an experiment involving a willow tree. Helmot discovered that plants did not get their nutrients from the soil. However, it took several other botanists and scientists to unravel the process of photosynthesis.
Joseph Priestley, a chemist, discovered that air was composed of gases. In 1730, Dutch biologist Jan Ingenhousz reported that plants produced oxygen. Further discovery was made by Jean Senebier, a Swiss botanist, who uncovered the role of carbon dioxide in photosynthesis. It wasn't until 1845 that Swiss chemist Nicolas-Theodore de Saussure was able to finally draw all the pieces of photosynthesis together.Learn More
Scientists believe iron was first discovered in Egypt. Iron has been found in many ruins across the ages, ranging from as far apart as Mesopotamia and the western Roman Empire, but the oldest iron relics were found in Egypt and date from around the year 5000 BC.Full Answer >
Copper was one of the first metals man discovered and used, so no one is sure of the exact date of its discovery. Archaeologists have discovered copper tools and decorative items dating to 9000 B.C.Full Answer >
It is unknown specifically who discovered coal, but evidence of its use as a light and heat source is documented as far back as several thousand years ago. Archaeological evidence exists of the use of coal by the ancient Chinese and the Romans.Full Answer >
The discovery of biomass cannot be linked to a specific individual; the earliest humans used biomass from wood to create fire for cooking and warmth. Biomass is the material from living things that is used to create energy.Full Answer >