Itâs claimed that this process bonds the keratin to the hair, leaving the hair temporarily straighter, softer and smoother. Pros. 1  This less invasive treatment is kinder on hair than traditional relaxing systems that use stronger alkaline chemicals to break down the bonds within the hair.ons. 1  As the name suggests, this technique relaxes hair rather then leaving it poker straight, so if you want absolute stick straight and frizz-free hair, this method may not be for you. 2  As with every chemical process, the ever present risk of damage is there.
Throughout the Corps more than 4,000-mile journey, Captains Lewis and Clark recorded 178 plants and 122 animals not previously known to science. Lewis recorded and pressed and preserved some 240 different plant species and brought them back to Washington, along with hundreds of animal and bird skins and skeletons.
For thousands of years, even as humans came to depend almost entirely on agriculture for food, no one had any idea or even thought to ask the question. Then, in the early 1600s, an early Flemish researcher named Jan Baptiste van Helmont experimented with growing plants in pots of carefully weighed soil. In one trial, he grew a tree from a seedling to a weight of 86 kg (189 lbs) in 90 kg (200 lbs) of soil, watering the tree with rainwater. Carefully re-weighing the soil, he found only 57 g (2 oz) missing. While van Helmonts conclusion  that the material making up the tree had come from the water  was not exactly correct, he had made a very important discovery, which was that almost none of it had come from the soil.