If your dad is anything like mine, he's awesome, loves granola, art, and science, and is still introducing you to cool stuff ("Fine, I'll give Dr. Who a try I guess, dad..."). What do you give the dude who gave you life? Here are some ideas:
Wired Magazine Subscription, $20
When I was forwarding Wired articles to my dad more than once a week, I realized it was time to get him his own subscription.
Seatbelt Cutter Window Breaker, Amazon, $12.22/pack of 4
Give one to every dad you know but save one for the very best gift you can give a dad: keep one for yourself.
Emergency Flashlight, Amazon, $24.99
Solar-powered and hand-crank flashlight with AM/FM NOAA weather radio, smart phone charger and cables, perfect for all occasions.
Recent Astronaut Autobiography, your local bookstore, prices vary
I believe Chris Hadfield's An Astronaut's Guide to Life on Earth is the most recent? Also, Packing For Mars by Mary Roach is a few years old but I highly recommend it.
Dr. Who Ornaments, Think Geek, $8.95
What better way to thank him for introducing you to such greatness? I must see if someone makes Vicar of Dibley and Cosmos ornaments...
Wolf, National Wildlife Federation, $20-$50
The kids are all moved out of the house, he can finally adopt that wolf he's always wanted.
Andy Goldsworthy Book, your local bookstore/Amazon, prices vary
Art plus nature? Get him one every year!
National Parks Pass, National Park Service, $80
Or a state park pass, if it would be more convenient for him. Don't forget to look into senior discounts!
Your Dad may vary, of course— any other favorite dad-appropriate gift suggestions? Feel free to peruse The Toast's Dad Magazine for further ideas!