4 magnitude earthquake recorded on Saturday near the Democratic People's Republic of Korea's most recent nuclear test site was "natural"

Chinese-American Yuan Chang, 58, joined the list of physiology or medicine laureates, together with her husband Patrick SKaposi's sarcoma (KS) is the most common cancer in HIV-infected untreated individuals

Tsien (1952-2016) got his Clarivate citation prize of chemistry in 2008, before he co-won the Nobel honor in chemistry at the same year, with Osamu Shimomura and Martin Chalfie, for the discovery and development of the green fluorescent protein (GFP)Professor Chang is a Co-Director of the Tumor Virology Laboratory at the University of Pittsburgh Cancer InstituteIn the last 15 years, 43 Citation Laureates have gone on to receive Nobel honors, so the prize has been seen as an indicator of the Nobel prizes, introduced in memory of Swedish chemist Alfred Nobel (1833-1896)

Each year, analysts at Clarivate Analytics mine millions of citations in the Web of Science, an online subscription-based scientific citation indexing service, to identify top-tier researchers in physiology or medicine, physics, chemistry and economicsKaposi's sarcoma-associated herpesvirus is the infectious cause of this neoplasm

Here, we present some of the most striking images around the world this past week

Children cool off themselves at a wading pool in Toronto, Canada, on Sept 24, 2017Reynolds, who succeeded Terry Branstad as governor when he became the US ambassador to China on May 22, noted that agricultural "is the backbone of Iowa's economy and contributes about $112 billion to our economy annually"

"Relationships are especially important in China, and we are fortunate that Governor Branstad welcomed a then local agricultural official from China over 30 years ago into Iowa named Xi Jinping, who is now the nation's president," said ReynoldsLast year, nearly $6 billion worth of US pork was exported to China, including more than $1 billion from Iowa

"We will have representatives from our corn, soybean, beef, egg, poultry, dairy and turkey sectors seeking an opportunity to expand their footprint in China as the country's middle class grows," Reynolds said of the 10-day trip, which began on WednesdayHis wish came true on June 30 in Beijing when Branstad had prime rib from Nebraska to celebrate the return of US beef to China after 13 years