Google has built its first self-driving car prototypes and hopes to test hundreds more models this summer. If all goes well, the company is planning a pilot program in California over the next few years.

“Cassowaries are large, flightless birds related to emus and (more distantly) to ostriches, rheas, and kiwis”, writes Olivia Judson in the September issue of National Geographic magazine. How large? People-size: Adult males stand well over five foot five and top 110 pounds. Females are even taller, and can weigh more than 160 pounds. Dangerous when roused, they’re shy and peaceable when left alone. But even birds this big and tough are prey to habitat loss. The dense New Guinea and Australia rain forests where they live have dwindled. Today cassowaries might number 1,500 to 2,000. And because they help shape those same forests – by moving seeds from one place to another – “if they vanish”, Judson writes, “the structure of the forest would gradually change” too. (Photo by Christian Ziegler/National Geographic)

Police officers detain a Femen activist during a demonstration of supporters of former Spanish dictator Francisco Franco, during annual gathering held on the week of the 45th anniversary of the dictator's death, in Madrid, Spain, November 22, 2020. (Photo by Javier Barbancho/Reuters)

An elderly woman plays an accordion in Moscow, Russia on October 3, 2017. (Photo by Mladen Antonov/AFP Photo)

Ecuador fans ahead of the FIFA World Cup Group A match at the Al Bayt Stadium, Al Khor on Sunday, November 20, 2022. (Photo by Mike Egerton/PA Wire Press Association)

In this photo provided by NASA, the sample return capsule from NASA's Osiris-Rex mission lies on the ground shortly after touching down in the desert, at the Department of Defense's Utah Test and Training Range on Sunday, September 24, 2023. The sample was collected from the asteroid Bennu in October 2020. (Photo by Keegan Barber/NASA via AP Photo)

A monkey is being fed by a foreign tourist during the annual Monkey Banquet at Phra Prang Sam Yod ancient temple in Lopburi, some 180km from Bangkok, central Thailand, 24 November 2024. The annual gala has been organized since 1989 by Lopburi's entrepreneur Yongyuth Kitwatananusont, offering all-you-can-eat fruits, vegetables, and desserts for monkeys to honor the long-tailed macaques to attract tourists to visit the town to promote tourism. (Photo by Rungroj Yongrit/EPA)