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.
Exciting magnet exploration for ages 8 and up!
View the glory of space with this hi-tech telescope set!
A massive mounted set of 100 rocks and minerals found in the US,
This ultimate chemistry set features 250 mind-boggling experiments!
This science kit is an essential introduction to physics knowledge!
Get this great introductory chemistry kit for your favorite young scientist!
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.