Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

The ABCD Study, the largest of its kind in the United States, is tracking nearly 12,000 youth as they grow into young adults. Investigators regularly measure participants' brain structure and activity ...

Obesity is a growing epidemic in children and adults. A large national study published in the International Journal of Obesity now finds that preteens carrying excess weight have notable differences ...

Objective To compare regional cortical thicknesses and subcortical gray matter volumes between children aged 9–10 years who play American football vs. non-contact sports. Design Secondary analysis of ...