The recent death of Elijah Cummings at age 68 underscores a disturbing statistic: black men die, on average, five years younger than white men. A study shows racism's effects on gene activity.
The controversial condition was classified as a disorder last year.
The benefits of regular exercise keep adding up.
There may be a biological association between father's age and offspring's lifespan.
The finding could have applications in other animals, including humans.