One of the most difficult forms of cancer to cure is a type of leukemia known as chronic myelogenous leukemia. While current treatments can keep it at bay, the cancer's drug-resistant stem cells mean a relapse is potentially always imminent.
For centuries, we've used a dye derived from lichens to provide the red coloring for food and fabrics. This dye contains a compound called orcein, and we've just discovered its most remarkable property: it can fight Alzheimer's disease.
Near the star Rho Ophiuchi, there are thick cosmic dust clouds from which new suns are born. While the vast majority of particles in the clouds are hydrogen, a newly discovered molecule could explain where water came from.