Ethiopian long distance runner, Lelisa Desisa, takes part in a practice session on the outskirts of Addis Ababa. Photograph: Getty Images

The next time you are on a treadmill, try this simple experiment. First, hold down the speed button until it reaches 13.1mph – assuming it even goes t(...)

Dzhokhar Tsarnaev (21) was found guilty of killing three people and injuring 264 in the April 15th, 2013, bombing on the Boston Marathon, as well as fatally shooting a police officer three days later. Photograph: EPA/FBI

Boston Marathon bomber Dzhokhar Tsarnaev apologised at a Wednesday hearing to formally sentence him to death for the 2013 attack. “I am sorry for the (...)

A makeshift memorial on Boylston Street, near the finish line of the Boston Marathon. A message to Krystle Campbell, one of three people killed in two bomb blasts at the race two years ago, and a Champagne bottle adorned the site a day after Dzhokhar Tsarnaev was sentenced to die for his role in the attack. Photograph: Seán Proctor/The New York Times

A Kazakh exchange student who was friends with the Boston Marathon bomber was sentenced to 3½ years in US federal prison on Friday for removing a back(...)

A participant number tag is seen among running shoes left at the makeshift memorial following the 2013 Boston Marathon bombings, in an exhibit titled “Dear Boston: Messages from the Marathon Memorial” at the Boston Public Library.  The 118th running of the Boston Marathon will be held on Monday. Photograph:  Brian Snyder/Reuter

This might have been the year they celebrated and commemorated James Duffy. Joint centenaries like this don’t come around too often: 100 years (...)

Investigators on Boylston Street, where two explosions near the finish line of the Boston Marathon Monday killed three people. More that 170 were injured. Photograph: Gretchen Ertl/The New York Times

President Barack Obama labelled the Boston Marathon bombings an “act of terror” as US law enforcers(...)