solar power

 All images © Tomás Saraceno In late January in Salinas Grandes, Jujuy, Argentina, artist Tomás Saraceno (previously) launched a black air balloon powered only by the sun and air, forgoing lithium, helium, or fossil fuels. By absorbing ultraviolet rays to heat the air and allow it to raise, the balloon can hold 250 kilograms, […] More