Katy Ayers and Ashley Gordon, two Americans from Grand Island, Nebraska, were awarded a Guinness World Record after they built the world's largest boat made of mushroom mycelium.
Measuring 2.3 meters in length, this canoe that was christened the Myconoe is made from 100% organic matter and is compostable. Ayers, who was a student in Columbus when they built the canoe, grew the canoe with mushrooms and indicated that it sprouts every time she takes it out into the water.
See some pictures at carolina.cl.