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Tim/CC-BY-ND-2.0 The coolest thing about conversation hearts is sorting through them and reading all the sayings.

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Tim/CC-BY-ND-2.0 The coolest thing about conversation hearts is sorting through them and reading all the sayings.

Juliana Veracka

Meagan Peoples NEW

MEGAN DONNELLY/FOR THE NEWS-LETTER

A11 Megan Donnelly Deadpool

Megan Donnelly/For the news-letter

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Yolanda VIA FLICKR Castilla, a Hopkins alumnus, discussed Peru’s economic strengths.

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LEON SANTHAKUMAR/PHOTOGRAPHY EDITOR City Health Commissioner Leana Wen has worked on projects relating to overdose and violence prevention.

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CINDY JIANG/PHOTOGRAPHY STAFF Ben Yuhas talked about his work on presidential campaigns.

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FILE PHOTO The death of Freddie Gray in April 2015 sparked protests, with the effects still being felt today.

a1GW4_CLASS groundbreaking_credit courtesy of CLASS Science Team

CLASS SCIENCE TEAM Ground was broken last spring at CLASS’s site in the Chilean desert.

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LIGO The LIGO Livingston Observatory in Louisiana.

GW2_black hole merger with emitted GWs_credit JPL

JPL An illustration of gravitational waves formed by two black holes orbiting each other at increasing speeds.

GAGE SKIDMORE VIA FLICKR/CC BY-SA2.0 Snowden talked to the FAS attendees via Google Hangouts.

SOFYA FREYMAN/PHOTOGRAPHY STAFF Nearly 1,500 people lined up outside Shriver Hall, anticipating former NSA contractor Edward Snowden’s virtual discussion on privacy.

JPL An illustration of gravitational waves formed by two black holes orbiting each other at increasing speeds.

CLASS SCIENCE TEAM Ground was broken last spring at CLASS’s site in the Chilean desert.

LIGO The LIGO Livingston Observatory in Louisiana, with the two vacuum tubes extending out of frame.

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SOFYA FREYMAN/PHOTOGRAPHY STAFF Nearly 1,500 people lined up outside Shriver Hall, anticipating former NSA contractor Edward Snowden’s virtual discussion on privacy.