8 Things Sharks Do for You Without You Knowing

You scared of sharks? In reality, you have more chances of being struck by lightning than being bitten by a shark. Still, sharks do have a bad rap, even though they’re not as horrible as people think. They’ve even been known to save people! No, really, sharks are amazing!

Did you know, for example, that they can hear as far as 800 ft away? They’re even able to catch the sound of their prey tensing its muscles. They’re also older than dinosaurs. Scientists believe sharks have been around for about 450 million years. For comparison, the first dinosaurs appeared more than 200 million years later!

Other videos you might like:
10 Facts About the Biggest Shark Ever Existed https://www.youtube.com/watch?v=l2QUnzSlR24&
Why No Aquarium In the World Has a Great White Shark? https://www.youtube.com/watch?v=V4lOjZvtVO8
The Only Way to Survive When You See a Shark youtube.com/watch?v=nfwEQiPfrRg

TIMESTAMPS:
They keep the ecosystem in balance 0:23
They help cure diseases 1:00
They inspire design innovations 1:44
They might improve planes and cars 2:28
They prevent global warming 3:09
They make people richer 3:52
They can save people 4:31
They can be your friend 5:20
Amazing shark facts 6:07

Preview photo credit:
Shark scales. Coloured scanning electron micrograph (SEM) of scales from the skin of a shark: By EYE OF SCIENCE/Science Photo Library/EAST NEWS, https://www.eastnews.ru/pictures/picture/id/1731795/i/16/t/41
Animation is created by Bright Side.

Head of a goblin shark (Mitsukurina owstoni) with jaws extended: By Dianne Bray/Museum Victoria - http://www.fishesofaustralia.net.au/home/species/3254, CC BY 3.0 au https://creativecommons.org/licenses/by/3.0/au/deed.en, https://commons.wikimedia.org/w/index.php?curid=25593311

Elephant Fish (Australian Ghost Shark), Melbourne Aquarium: By Fir0002/Flagstaffotos, GFDL 1.2 http://www.gnu.org/licenses/old-licenses/fdl-1.2.html, https://commons.wikimedia.org/w/index.php?curid=864471

Dermal denticles of a lemon shark viewed through a scanning electron microscope: By Pascal Deynat/Odontobase, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, https://commons.wikimedia.org/w/index.php?curid=15564795

Animation is created by Bright Side.

SUMMARY:
- Sharks feed on smaller fish, and smaller fish feed on phytoplankton. Without sharks, there’ll be too many fish eating the plankton. It all boils down to one thing –a lack of oxygen.
- Researchers found a special compound called squalamine in dogfish sharks' tissue that can fight various chronic infections in humans.
- Great white sharks can move at a speed of up to 25 mph. The secret is in their denticles – small, flat, V-shaped scales. Olympian swimsuit designers did their best to duplicate the sharks’ denticles, creating a fabric that makes swimmers sleeker and faster in the water.
- A 2018 Harvard University study suggests that these unique denticles on sharks’ skin can also help to create more efficient planes and cars.
- Without sharks, the marine creatures keep eating the seagrass, disrupting the blue carbon ecosystems, and releasing ancient carbon. This has the same effect as the greenhouse gas emissions from cars that destroy the ozone layer.
- People are scared of sharks, but they’re also fascinated by these majestic predators. And over the last two decades, this fascination has turned into a thriving ecotourism industry.
- A diving instructor from Port Macquarie, Australia, has been buddies with a female Port Jackson shark for over half a decade. The man met his friend when the shark was just a pup.
- Not all shark species live in the ocean. You can also see them in some freshwater lakes and rivers.
- The sharks’ skeleton isn’t made of bones. It consists of only cartilage and muscle, which is much less dense than bones.
- Sharks have rows and rows of teeth, and can grow as many as 30,000 teeth in a lifetime.
- Believe it or not, sharks and humans have a common ancestor that lived around 440 million years ago.

Music by Epidemic Sound https://www.epidemicsound.com/

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