Greatcoats actually work well on a bike when it starts to get pretty cold (ca. -20°C), I have a thick wool one that is Russian navy surplus and I might look like I just biked off of a warship, but it keeps me warm yet also breathes if I get too warm. Also, it’s long but splits down the middle nicely when I straddle my bike.
I haven’t biked in much colder than that, though in the winter it easily gets to -30 to -40 here. I kinda want to try but it’s quite intimidating both in terms of keeping all my extremeties as well as all the ice.
Your science teacher was wrong, unfortunately. In Classical Latin, datum is pronounced as [ˈd̪ät̪ʊ̃ˑ] “dah-too(m)” and likewise data as
[ˈd̪äːt̪ä][ˈd̪ät̪ä] “dah-tah.”Not that Latin should really have a say in how we speak English anyhow.