Why health influencers are obsessed with mitochondria. By Dana G. Smith Last summer, Health Secretary Robert F. Kennedy Jr. said he could tell that someone was having “mitochondrial challenges” just ...

Relative Energy Deficiency in Sport (REDs) was first introduced in 2014 by the International Olympic Committee’s expert writing panel, identifying a syndrome of deleterious health and performance ...

In the oceans and on land, scientists are discovering rare, transitional organisms that bridge the gap between Earth’s simplest cells and today’s complex ones. By Carl Zimmer A flurry of new studies ...