Easy Science Quiz!

Because veins often look bluish, there's a misconception that human blood is blue until it's exposed to the environment. That's not true -- human blood is always red.

The purest gold is also the softest. So soft, in fact, that you can push and pull it like clay with your bare hands.

Conifers use needles (instead of bigger leaves) for photosynthesis. With their triangular shape, the trees maximize light exposure all the greatest number of needles.

Babies aren't big blinkers -- they often only blink a couple of times per minute. And scientists aren't sure why that's the case.

The same chemical elements are found most everywhere in the universe. These elements give scientists a starting point for comparisons and type of scientific experiments.

There are many different types of berries on Earth ... and only a few have "berry" in the name. Tomatoes? A berry. The same goes for pineapples, oranges and a lot more.

All of our solar system's planets have at least one moon. Except for Venus and Mercury ... they have no moons at all.

Just keep in mind that you're in over your head when you're swimming. Humans and sharks have teeth that are roughly the same toughness. But we do not advise that you test this theory in the water.

Plants use light to generate chlorophyll, a greenish pigment that makes light absorption possible in the first place. This pigment is necessary for photosynthesis.

The sun is about 93 million miles away from Earth. Light travels at about 186,000 mph ... meaning it takes about 8 minutes to cover the distances from there to here.

Cockroaches are living example of durability under all conditions. They've been around for 280 million years ... that's tens of millions of years earlier than even the earliest dinosaurs.

Killer whales aren't whales. It's the largest type of dolphin ... and it can be as long as 30 feet. Expert divers can swim with killer whales and even train them to do various tricks.

They really are like dragons. Komodo dragons are Earth's heaviest lizards. Some of them can top 130 pounds, and they sometimes have an aggressive streak.

Barometers are critical tools for measuring atmospheric pressure. As this pressure rises and falls, weather forecasters can generate accurate predictions for a variety of conditions.

You think sound travels fast through air? Try underwater -- when submerged, sounds travel about four times faster than those that are above the waves.

Light is an energy beam made up of particles. Those particles slow down a tiny bit when they strike air, and even more when they try to pass through water.

The most common element in the human body, by mass, is oxygen. Oxygen makes up about 65% of your total mass.

Pregnant women must support their own needs as well as those of a tiny fetus. She'll have 50% more blood in her body by the time week 20 rolls around.

In popular legend, camels store water in their humps. But the humps are actually high in fat, which the camel burns when caloric intake is too low.

Mercury is one of just two elements that are liquid at room temperature, one reason it is used in thermometers. The other is bromine.

The human heart is an incredible bit of natural engineering. Each year, it beats about 30 million times -- more than 100,000 times every day.

Peanuts aren't nuts. They're a type of legume ... or bean. But if you call it "bean butter" people will look at you funny.

Dolphins emit a vast array of clicks, whistles and other sounds. Those sounds are often an aspect of echolocation, in which the sounds bounce off underwater objects and return to the dolphin, which uses this information to locate various prey or obstacles.

Hydrogen, sweet hydrogen, is the most common chemical element. Without it (combined with oxygen) we'd have no water to drink.

Earth's oceans are crazy deep, on average more than 12,000 feet down. That's roughly eight Empire State Buildings ... but there are places more than three times deeper.

Almost all animals blink ... and most of them move both eyelids at once. But hamsters are odd, blinking just one eye at a time, giving them a cute winking look.

The human body can withstand massive blasts of voltage -- about 90% of strike victims survive. Sadly, many of them experience permanent suffering from the strike.

Platypus venom is an odd phenomenon in part because so few mammals create venom of any kind. When it hits a human, the stings are very painful but not lethal.

Mars is a tantilizing destination for many scienists. If astronauts do get to blast off for Mars, it will take them more than half a year -- or even eight months -- to get there.

Lightning kills about 50 Americans each year ... so you know it's deadly. It's also hot -- about 54,000 degrees Fahrenheit.

A supercell is a notorious type of thunderstorm. Supercells can pummel the Earth for hours on end, spitting hail, lightning ... and tornadoes.

We humans have discovered 118 elements. Roughly three-quarters of those elements are metals, many of which we use in vital tools in our everyday lives.

Dolphin skin is amazingly smooth and soft. Why? The creature quickly sloughs off old dead skin cells, regenerating them every few hours.

At just the right combination of pressure and temperature, some elements reach their "triple point," in which they exhibit traits of gas, liquid and solid ... all at once. In many cases, the triple point can be created in lab environments.