Usually works with a single dose.

A group of engineering students in Japan turned a futuristic idea into reality by creating a bicycle that can actually fly. Instead of using fuel or electric motors, the experimental vehicle runs entirely on human power. When the rider pedals, the motion spins a large propeller that generates thrust and lift, allowing the lightweight craft to briefly rise off the ground.

The flying bicycle is made with ultra-light materials like carbon fiber and aluminum to keep it as light as possible. Large wings or rotor blades help create the lift needed for flight, while the pedaling system transfers energy to the propeller, similar to how a regular bicycle chain powers the wheels.

Human-powered flight has fascinated engineers for many years. Projects like this show how smart design, lightweight materials, and efficient aerodynamics can make flight possible using only muscle power. Although these prototypes can usually fly only short distances and require careful conditions, they highlight how creativity and innovation can push the limits of what human strength can achieve.

The pygmy marmoset, often called the “finger monkey,” is the smallest monkey in the world. It lives in the rainforests of the Amazon Basin in South America, where it spends most of its time high in the trees. These tiny primates are excellent climbers and move quickly through branches using their sharp claws and strong grip.

Their diet mainly includes insects, fruits, and tree sap. One of their unique abilities is using their sharp lower teeth to chew small holes in tree bark so sap can flow out. They then return to these holes to drink the sweet sap throughout the day.

Despite their tiny size, pygmy marmosets are very social animals and live in small family groups. An adult pygmy marmoset usually weighs around 100 grams (about 3.5 ounces), which makes it small enough to sit comfortably on a human finger.

In Turkey, authorities place real crashed cars on roadside poles near highways as a powerful warning to drivers. The wrecked vehicles highlight the dangers of speeding and reckless driving.

Many drivers reportedly slow down after seeing these shocking displays, making the unusual road-safety campaign surprisingly effective.

At least hers was consensual...