After 30 years, researchers believe they finally have definitive evidence of the primary cause of Gulf War syndrome: exposure to low levels of the nerve gas sarin.
It has happened to millions during the pandemic: a sudden loss of smell that heralds the start of a COVID-19 infection. But scientists have been stumped as to why.
A handful of "locked-in" amyotrophic lateral sclerosis (ALS) patients can now work a laptop computer using their brain waves, thanks to an implant lodged in a major vein inside their skull.
