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.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
This set includes three (3) N95 FDA registered and NIOSH approved and respirators.
Professional Powder-Free Textured Nitrile Exam Gloves with Aloe, Size Large
Box of 100 X-LARGE nitrile exam gloves.
This set includes four (4) N95 NIOSH approved respirators.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
A combination of three of our great discovery toys, all in one package!
Exciting magnet exploration for ages 8 and up!
Get swept away by this fantastic robot kit that uses vibrations to move!
Working model representing the sun, earth, and moon and their relationships.
See the solar system in action!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
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.