A. Roger Ekirch

Professor, Department of History; Virginia Tech

A.J. Jacobs

Best-Selling Author & "Human Guinea Pig"

The Year of Living Constitutionally: One Man's Humble Quest to Follow the Constitution'...

Aaron Blight

Author of "When Caregiving Calls," Founder of Caregiving Kinetics, Aging & Healthcare Consultant

Aaron Carroll

Director of the Center for Health Policy & Associate Professor of Pediatrics

Aaron Horowitz

Co-Founder & CEO of Empath Labs; Creates Patient-Centered Healthcare Technology

Aaron Weiner

Psychologist & Owner of Bridge Forward Group

Abel James

Bestselling Author, Musician, and Talk Show Host; Best Known for His Award Winning Show, "Fat-Burning Man"

Adalynn E. Harris

Founder and President of Equity Bridge Consultants

Blacks In Science

Adam B. Hill

Pediatric Palliative Care Physician, Author & Mental Health Advocate

Adam Beach

Award-Winning Canadian Actor

Adam Kepecs

Neuroscientist

Adam Kreek

Gold Medal Olympian, Four-time World Champion, Entrepreneur & High Performance Expert

Adam Segal

Senior Fellow for China Studies and Director of the Digital and Cyberspace Policy Program at the Council on Foreign Relations

Adaora Okoli

Internal Medicine Resident, Tulane University

Adewale Troutman, MD, MPH, MA, CPH

President, American Public Health Association (APHA); Director, Public Health Leadership & Practice at University of South Florida

Adi Utarini

Indonesian Public Health Researcher; Dengue Fever Control & Prevention

Adrienne Boissy

Chief Experience Officer, Cleveland Clinic

Afshan Khan

Global Relief Mobilizer, Director of Office of Emergency Programmes (EMOPS), UNICEF

Agapi Stassinopoulos

Inspirational Teacher & Best-Selling Author; Known for "Wake Up to the Joy of You: 52 Meditations and Practices for a Calmer, Happier Life"

Agnes Binagwaho

Vice-Chancellor at the University of Global Health Equity; Global Health & Senior Lecturer at Harvard Medical School