![Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March](https://l450v.alamy.com/450v/2ex28dg/data-scientist-rachel-kalmar-is-pictured-wearing-multiple-wearable-technology-devices-in-washington-dc-on-march-18-2015-kalmar-wears-a-range-of-devices-including-the-nike-fuelband-fitbit-basis-pebble-jawbone-and-misfit-shine-among-many-others-as-part-of-an-experiment-to-create-as-much-data-about-herself-as-possible-photo-credit-kristoffer-tripplaar-sipa-usa-please-use-credit-from-credit-field-2ex28dg.jpg)
Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March
![Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March 18, 2015. Kalmar wears a range of devices including the Nike FuelBand, Fitbit, Basis, Pebble, Jawbone Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March 18, 2015. Kalmar wears a range of devices including the Nike FuelBand, Fitbit, Basis, Pebble, Jawbone](https://c8.alamy.com/comp/2EX28DE/data-scientist-rachel-kalmar-is-pictured-wearing-multiple-wearable-technology-devices-in-washington-dc-on-march-18-2015-kalmar-wears-a-range-of-devices-including-the-nike-fuelband-fitbit-basis-pebble-jawbone-and-misfit-shine-among-many-others-as-part-of-an-experiment-to-create-as-much-data-about-herself-as-possible-photo-credit-kristoffer-tripplaar-sipa-usa-please-use-credit-from-credit-field-2EX28DE.jpg)
Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March 18, 2015. Kalmar wears a range of devices including the Nike FuelBand, Fitbit, Basis, Pebble, Jawbone
![Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March Data scientist Rachel Kalmar is pictured wearing multiple wearable technology devices in Washington, D.C., on March](https://l450v.alamy.com/450v/2ex28dh/data-scientist-rachel-kalmar-is-pictured-wearing-multiple-wearable-technology-devices-in-washington-dc-on-march-18-2015-kalmar-wears-a-range-of-devices-including-the-nike-fuelband-fitbit-basis-pebble-jawbone-and-misfit-shine-among-many-others-as-part-of-an-experiment-to-create-as-much-data-about-herself-as-possible-photo-credit-kristoffer-tripplaar-sipa-usa-please-use-credit-from-credit-field-2ex28dh.jpg)