The power of DNA as a siman for identification of a body

When a person takes an item that they found in order give it back- does he have to return. it

Finding old/rusted items on someone else's property- who do they belong to?

What is the source and parameters for "going beyond the letter of the law"?

What constitutes actually giving up hope that a person will never recover their lost item

Using somebody else's item without their permission- is that stealing or borrowing?

How does the mechanism of yeush work on a legal and spiritual level?

When the roof of Rav Huna's Beit Midrash cracked and splintered

The difference between identifying a lost item using a siman vs. teviyut ayin

How to tell who the true signed name on a document is when there is more than one person with the same name in that town