Test Your Knowledge

Explanation: With an average heartbeat of 70 beats per minute and a lifespan of 70 years, your heart would beat more than two and a half billion times, without ever pausing to rest.

Explanation

Renowned for its remarkable flight speed, the peregrine falcon is distinguished as the fastest bird globally, capable of reaching speeds exceeding 300 km (186 miles) per hour during dives. This exceptional velocity also earns it the title of the fastest animal on Earth.

Explanation

The tallest waterfall in the world is Angel Falls in Venezuela. With a height of 3,212 feet (979 meters) and a continuous drop, Angel Falls holds the title as the highest waterfall on the planet.

Explanation

Within the periodic table of elements, the letter J is notably absent. While elements are categorized by their chemical properties and atomic numbers, the letter J is not assigned to any element symbol, distinguishing it as the sole letter not represented in this scientific framework. 

Explanation

Rats exhibit laughter-like vocalizations due to their ticklish skin. When playfully tickled or engaged in social interactions, rats emit high-frequency chirps or ultrasonic vocalizations resembling laughter. This behavior is indicative of their capacity for joy and shared experiences, reflecting a surprising aspect of their social and emotional lives.

Explanation: Water covers 70% of the Earth’s surface--and it’s always cycling through the atmosphere, oceans, and land surfaces. Water moves through the water cycle by constant evaporation, condensation, and precipitation. 

Explanation: The heart grows along with the rest of the body. A child’s heart is about the same size as their fist. The size of an adult heart varies with age, sex, height, and weight. 

Explanation

The color of blood when inside the body is red. This is due to hemoglobin, a protein that binds with oxygen and gives blood its red hue. The presence of oxygenated or deoxygenated blood determines its shade of red.