You're likely thinking of the X-rays. X RAY
collagen fibers are part of the bone tissue
compact tissue
Bone Marrow - Apex
George Washington, sorry no wooden teeth ever.....
Through breathing of dust that has lead and through eating it, like putting hands that have lead on them from various sources into his or her mouth. For more information, see the Related Links.
Radio wave lengths
One example would be X-Rays. They are stopped by Lead, but travel through other matter and empty space.
The whole point of dark matter is that it doesn't interact via the electromagnetic force (that's what makes it "dark"). It's therefore largely unaffected by normal matter (except through gravity), and could go straight through your body... or a lead wall, or the Earth... without you even noticing. In fact, if dark matter really exists, that pretty much has to be happening all the time.
Lead
Bone cysts cause fractures and damage to bone tissue
Lead. Even a thin layer of lead blocks most radiation, where bone is fairly transparent at many frequencies.
One example would be X-Rays. They are stopped by Lead, but travel through other matter and empty space.
A broken bone is a bone that has suffered stress. Such stress could lead to several types of fractures.
collagen fibers are part of the bone tissue
Ignoring a broken bone can lead to disability infection or death if you are unlucky,
It demonstrated that the slavery question would never be settled except through violence.
Lead is solid at room temperature.