Sharks like the great white can smell blood up to 3 miles away. According to National Geographic, sharks can smell one drop of blood in 25 gallons of water, 3 miles away.Know More
Sharks like the great white shark are carnivores, meaning their diet consists of meat. Great whites grow to be about 15 feet long and can weigh up to 5,000 pounds. They have a gray body meant to blend in with the ocean bottom and are called "great white" sharks because of their white underbellies.
When one animal attacks another and blood is spilled, that blood can attract sharks for miles around. The shark's keen senses allow it to quickly hone in on the source of the blood and sharks often take a test bite to find out if a meat is suitable for eating. This test bite is what is likely what is happening when a shark bites a human.Learn more about Sharks
Sand tiger sharks have 44 to 48 upper teeth and 41 to 46 lower teeth, so they can have anywhere from 85 to 94 teeth in total. The front teeth are long and jagged and can be seen even when the shark's mouth is shut. Many of the sand tiger shark's teeth are small and are located in the back corners of its mouth.Full Answer >
Although walking speeds can vary greatly, the average human walking speed is about 3 miles per hour. A moderate or brisk walking speed is approximately 4 mph, and race walkers can walk up to 6 mph or faster.Full Answer >
Sharks are fish, but unlike other fish, their skeletons are made of cartilage rather than bone, and instead of smooth, flat scales they have sharp, tooth-like scales called denticles. Scientists believe that sharks are 200 million years older than the oldest dinosaur, meaning they have been around for over 400 million years.Full Answer >
A stingray is not a shark, but the two are closely related. They belong to the same group of fishes called elasmobranchs, members of the group Elasmobranchii, a subclass of Chondrichthyes, which also includes skates.Full Answer >