The process of separating useful molecules from mixtures of other substances accounts for 15% of the nation's energy, emits 100 million tons of carbon dioxide and costs $4 billion annually.

Lawyers for both sides delivered closing arguments on Thursday in the trial of ASAP Rocky, who is accused of firing a gun at a former collaborator and faces up to 24 years in prison if convicted.

Amazon has passed another milestone in the rollout of its healthcare business, making its telehealth service available nationwide in the US and adding another 20 cities to its in-person services.

A clinical trial involves the study of the safety, efficacy and/or dosage regimen of a therapeutic intervention (such as a drug) in humans selected according to predetermined criteria of ...