The birth control sponge (aka the contraceptive sponge or “the sponge” for short), is a small, round sponge made from soft, squishy plastic. You put it deep inside your vagina before sex. The sponge ...

Research on cannabis was hotting up 50 years ago, and accessible lectures on the physics of matter from Nobel laureate William Bragg, in this week’s dip into Nature’s archive.