drucilla racial politics on the phone while it's 250th birthday for him barging on a voyage of discovery. expedition voyage on t.w. . welcome to your weekly dose of science beyond tomorrow today. our journey in the footsteps of alexander from humble continues to the orinoco river and south america. in the neighboring amazon basin huge fires are raging but not all blazes are necessarily bad for the environment. climate change isn't just affecting the rain forest how can we future proof our woodlands in other regions. but 1st to tortoises and turtles a fascinating bunch of giant galapagos tortoises can weigh up to 300 kilos sadly many species of these reptiles are in decline only 3 yangtze giant soft shell turtles are thought to still exist and that's even though a lot of these creatures have a very long life spans some of more than 200 years in was from what tom valentine wanted to know more. how do seem to find their way back to their place of birth. loga had to those uglow trotters following ocean currents they can travel more than 100 kilometers a day with their aerodynamic shape them