indigo

T's story didn't spring from nature: it is a tale that began long before the hormone was even isolated, when 19th-century scientists went looking for the chemical essence of masculinity. And so this molecule's outmoded, authorized life story persisted, providing a handy rationale for countless behaviors-from the boorish and the belligerent to the exemplary and enviable. Rebecca Jordan-Young and Katrina Karkazis focus on what T does in six domains: reproduction, aggression, risk-taking, power, sports, and parenting. Testosterone allows us to see the real T for the first time.

More than 700 years into its journey, a massive generation starship carries thousands of passengers to a new home that only their descendants - hundreds more years into the future - will live to see. Life aboard the ship is a daily struggle. One young welder copes by writing a series of letters to an Earth he never knew. The experiences he describes are not as exciting as the ancient works of science fiction made it out to be - but that is about to change. An eccentric old man has offered to train him for an unprotected spacewalk - a dangerous ritual known as “facing space”.