Did you know that until the 16th century, mariners and seamen referred to sharks as "sea dogs"? Sharks have actually been around for a long time--many scientists think a variation of the shark existed from over 420 million years ago! Sharks belong to a large group of fish that have a skeleton made of cartilage instead of bone. Because of this, the only fossilized remains of ancient sharks are their teeth.The teeth of sharks grow in constantly to replace older ones that wear out. It is estimated that sharks can lose up to 20,000 teeth in their lifetime. In fact, some ancient sharks had teeth that grew as long as 4 inches.
Want a great example of a shark tooth fossil? Invest in this 2-inch, inexpensive, authentic shark tooth fossil specimen to spruce up your science classroom! Also makes a unique gift, stocking stuffer, or party favor for adults and children alike!
Note: Please be aware that this is a natural fossil and as such each piece is one of a kind! The one you receive may not be exactly the same as the ones pictured but it will be similar. Price is per each piece. They come in irregular shapes, sizes and weights.
Recommended for protection against chemical splashes. A must have for every young chemist!
These goggles meet the American National Standards Institution (ANSI Z87.1) and Canadian Standards (CSA Z94.3) regulations.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
Large nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Durable, anti-fog safety glasses that fit comfortably on any head size.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
Experience this sphere powered by the sun!
This mirascope creates a 3D hologram image!
View the glory of space with this hi-tech telescope set!
Working model representing the sun, earth, and moon and their relationships.
This high precision gyroscope will amaze you with rotational speed and ease of precision.
Build a model green house and 9 other green energy-related devices with this great kit!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.