Top stories: A new human species, a potential treatment for MS, and is Alzheimer’s contagious?
(Left to right) B. K. Bangash/AP Photo;National Geographic Explorer; Leonard Lessin/Science Source

Top stories: A new human species, a potential treatment for MS, and is Alzheimer’s contagious?

New human species discovered

Scientists have identified a strange new kind of hominin named Homo naledi. Although the new fossils are still undated, making it hard to know where they fit into human evolution, they already reveal a very different way to be part of the human family tree.

Unusual ‘relic language’ comes from small group of farmers isolated for thousands of years

Scientists may have identified the origins of Basque, a mysterious and musical language that has no known relationship to any other tongue. A new study suggests that the Basques come from a group of early farmers that kept to itself as waves of migration swept through Europe thousands of years ago.

Is the Alzheimer’s protein contagious?

Could Alzheimer's be contagious? Controversial new research suggests that it may be possible to spread the Alzheimer’s protein through surgery or other procedures. But don't panic yet—scientists say more research is needed before they can offer up any definitive conclusions.

Polio resurfaces in Mali and Ukraine

Polio is so contagious that a single case is considered an outbreak. Now, polio outbreaks have been confirmed in Mali and Ukraine, with emergency campaigns scheduled to start as soon as possible.

Melatonin could help treat multiple sclerosis

A new study finds that melatonin, the “sleep hormone,” could potentially help give relief to patients with multiple sclerosis. Preliminary results are promising, but scientists warn that they’re still filling in the gaps on important details.