Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. It focuses on dependable (secure and reliable) low-power communication and standard protocols, such as ...

National Geographic's 100 best images of the year–curated from 106 photographers, 121 stories, and more than two million photographs. Leonardo’s “Mona Lisa” is believed to depict Lisa ...

In general: For men in their 40s and 50s: A PSA score greater than 2.5 ng/ml is considered abnormal. The median PSA for this age range is 0.6 to 0.7 ng/ml. For men in their 60s: A PSA score greater ...