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.
Box of 100 X-SMALL nitrile exam gloves.
Save with this large package of 300 medium-size nitrile exam gloves!
These premium 5mil medical-grade Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
This set includes four (4) N95 NIOSH approved respirators.
These goggles meet the American National Standards Institution (ANSI Z87.1) and Canadian Standards (CSA Z94.3) regulations.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
This glass Erlenmeyer mug makes an excellent gift!
Learn how solar cells transform light into electrical energy with this great kit!
Learn about detective science through this fun fingerprinting kit!
A combination of three of our great discovery toys, all in one package!
This SUPER Erector Construction set is one of the best you'll find anywhere!
This simple but amusing magnetic toy will keep you busy for hours!
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