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.
This necklace features one such authentic fossil, although considerably smaller than the prodigious fangs of ancient sharks. The fossil hangs from a metal coil attached to a fully adjustable cord that fits all sizes. Makes a great gift for the shark fan in your life, as well as an excellent stocking stuffer or party favor. Always a big hit with marine biology teachers.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Extra thick medical examination gloves - 60mil. Great for extra protection.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
This set includes two (2) N95 NIOSH approved respirators.
These goggles meet the American National Standards Institution (ANSI Z87.1) and Canadian Standards (CSA Z94.3) regulations.
Durable, anti-fog safety glasses that fit comfortably on any head size.
See the solar system in action!
You don’t think recycling is cool? Get a look at this, we’re sure you’ll change your mind!
This project book and sample kit introduces you to shape-memory alloy technology!
Check out this amazing renewable energy science kit featuring the wonders of hydroelectric power!
This quality Dobsonian style telescope features a 76 mm aperture reflector optical tube.
Discover how solar cells make electricity with this awesome kit!
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