1) Sloths only poop once a week, and when they do, they lose about one-third of their body weight.

2) The invention of the transistor by Bell Laboratories in 1947 revolutionized electronics and paved the way for the development of smaller, more efficient electronic devices.

3) The world's largest flower is the Rafflesia arnoldii, which can grow up to 3 feet (1 meter) in diameter and weighs about 15 pounds (7 kilograms).

4) The Amazon rainforest produces more than 20% of the world's oxygen.