Gustav Ising proposed linear accelerator principles in 1924. Rolf Widerøe built first working machine in 1928 at RWTH Aachen. Luis Alvarez developed resonant cavity drift tube linac in 1947. William Hansen created first travelling-wave electron accelerator in 1947
Solarpunk emerged in 2008 as an art movement against Cyberpunk and Steampunk. Vision emphasizes harmony between humans and nature in clean energy systems. Movement prioritizes decentralization and community over corporate dominance
Yerba mate (Ilex paraguariensis) is a South American holly plant reaching 15 metres. Male plants produce stronger leaves with more caffeine, female leaves subtler. Leaves are dried near wood fire, infusing them with smoky flavour
Contains green coffee extract, hibiscus tea, white grape juice, and natural sweetener. Made by brewing hibiscus tea, mixing with juice and simple syrup. Contains 45-55 mg caffeine and is vegan-friendly
Started practicing aikido in 1972, now over 50 years old. Currently teaches at Enighet dojo in Malmö, Sweden. Author of fiction and non-fiction books in English and Swedish
EnergyPlus is DOE's open-source whole-building energy simulation engine since 1997. Project received $83.3M in funding and $2.9M in FY20 cost share. Releases two annual updates: October and April, latest version 9.3.0 in 2020