Human
In general, humans can survive for two to eight weeks without food, depending on stored body fat. Survival without water is usually limited to three or four days. About 36 million humans die every year from causes directly or indirectly related to starvation. Childhood malnutrition is also common and contributes to the global burden of disease. However global food distribution is not even, and obesity among some human populations has increased rapidly, leading to health complications and increased mortality in some developed, and a few developing countries. Worldwide over one billion people are obese, while in the United States 35% of people are obese, leading to this being described as an "obesity epidemic." Obesity is caused by consuming more calories than are expended, so excessive weight gain is usually caused by an energy-dense diet.
The Source (Ayreon album)
After finally escaping from Alpha, the surviving humans are injected with a drug made by The Chemist (Tommy Rogers), named "Liquid Eternity" but mostly referred to as "The Source", that will make their bodies able to live underwater and communicate by telepathy, as the world they are going to is an aquatic one; it will also drastically extend their lifespans, making them virtually immortal. They put themselves in suspended animation, as their trip will take many years ("Aquatic Race"). In their sleep, the humans dream of the beautiful world that awaits them ("The Dream Dissolves"). The former Alphans ultimately awaken as they reach Sirrah and mourn, aware that during the many years it took them to travel, their planet, together with all their loved ones, has come to an end ("Deathcry of a Race"). However, they are also filled with hope at the sight of their new world ("Into the Ocean").