Porous materials are materials with pores (cavities, channels or interstices). The characteristics of a porous material vary depending on the size, arrangement and shape of the pores, as well as the ...

True crime. Real justice. "48 Hours" is the one to watch on Saturday nights. Our 38th season premiered on Saturday, Sept. 27, 2025. 10/9c: The Rx Defense: A Texas teenager shoots two of his friends.