Birds (S03E18)
S03E18
Researchers theorize that birds originated from reptiles. While birds possess backbones and reproduce by laying eggs, they have a distinctive characteristic that distinguishes them from all other creatures: feathers. These feathers are composed of keratin, the same protein found in human hair and nails. The combination of feathers, lightweight skeletal structures, robust wings, and strong cardiovascular systems enables birds to soar through the skies.
Show
Bill Nye the Science Guy
Episode
S03E18
Air Date
Oct 13, 1995
Season 3 Episodes
S03E01
Planets & Moons
S03E01
Pre-Inked Stamps, Cranberries, Cotton Yarn, Road Signs
S03E02
Pressure
S03E02
Combination Locks, Pottery, Recreational Vehicles, Erasers
S03E03
Plants
S03E03
Wheel Loaders, Vegetable Oil, Hand Tools, Cotton Swabs
S03E04
Rocks & Soil
S03E04
Temporary Metal Fences, Asphalt Shingles, Expanded Polystyrene Products, Hard Candies
S03E05
Energy
S03E05
Horse-drawn Carriages, Artificial Eyes, Dog and Cat Food, Mirrors
S03E06
Evolution
S03E06
Yogurt, Candles, Neon Signs, Bookbindings
S03E07
Water Cycle
S03E07
Prepared Mustard, Violins, Nuts and Bolts, Toilet Paper
S03E08
Fresh Cut Flowers, Adhesive Tape, Tofu, Lottery Tickets
S03E08
Friction
S03E09
Inflatable Watercraft, Couscous, Modelling Dough, Wicker Products
S03E09
Germs
S03E10
Wind Generators, PVC Gloves, Thermo-formed Glass, Fire Trucks
S03E10
Climates
S03E11
Radiators, Hatchery Chicks, Filo Pastry, Cross-Country Skis
S03E11
Waves
S03E12
Electric Baseboard Heaters, Moulded Pulp Containers, Chicken, Video Games
S03E12
Ocean Life
S03E13
Fire Fighter Boots, Garden Tools, Automated Machines, Gypsum Board
S03E13
Mammals
S03E14
Spinning Things
S03E15
Fish
S03E16
Human Transportation
S03E17
Wetlands
S03E18
Birds
S03E19
Populations
S03E20
Animal Locomotion