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17:17 Great Transitions - The Origin of Tetrapods Great Transitions - The Origin of Tetrapods	Great Transitions - The Origin of Tetrapods origin color vertebrates weather fossils. speciation zoology earth evolutionary biology paleontologist inuit culture geography environmental soil science limbs million years group sustainable development bears phylogenetics web colors fingers petrology reptiles fossil fragments caption complete biology theories tiktaalik biology animal devonian paleontology earth sciences animals in religion understanding youngest dinosaurs ancestors scientific classification effects greek mythology hydrology geology earliest terrestrial locomotion water geography terminology fossils evolution transitional biology terminology structures transition transitional fossils rocks suggests tetrapod animal anatomy creature aquatic ecology From Enes Aganovic 10 plays 0
07:22 Why Vaccines Work Why Vaccines Work	Why Vaccines Work onomatopoeias people percent vaccinated number vaccinologists eighteen immune system virology poliomyelitis children smallpox caption complete vitamins vaccination virus-related cutaneous conditions vaccines immune iso basic latin letters eliminate medicine medical terminology today nutrition sex education pediatrics demography molecular biology citrus measles million scurvy vitamin infection actuarial science c.. poxviruses mononegavirales reflexes infectious diseases vaccine population protect immunology epidemiology science disease youth immunity reproduction fruits prevention effects From Enes Aganovic 6 plays 0
07:23 Rise of the Superbugs Rise of the Superbugs	Rise of the Superbugs penicillin antibiotic people resistance viruses result evolutionary biology bacteria caption complete develop microbes drug culture fight environment pretty medicine transplant english grammar staphylococcus environmental science million infection fungus epidemiology biomolecules bacterial genetics super warfare billion evolution faster resistant fungi skills demography gazelles effects From Enes Aganovic 9 plays 0
04:13 How a single-celled organism almost wiped out… How a single-celled organism almost wiped out life on Earth	How a single-celled organism almost wiped out life on Earth atmosphere simple energy concepts in physics fuels years cyanobacteria inorganic solvents chemical elements nitrogen earth evolutionary biology extinction species geography fluid dynamics cell biology plant physiology sunlight thermodynamics complex molecules cell anatomy caption complete metabolism billion biology planetary science million greenhouse gases dioxide organelles effects microbe carbon food ingredients evolution endosymbiosis natural resources oxygen biology terminology organism climate history horticulture and gardening problem chemistry photosynthesis ancestor methane From Enes Aganovic 5 plays 0