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Glyptodon photo © Heinrich Harder Cholesterol as cost of progress from primitive hunter to industrial seed-eater Lipids vary greatly in their proneness to...

Atriplex canescens photo © Stan Shebs                                  Extra carbon to beat salt as opposed to heat Vegetation of Great Basin in winter photo © Qfl247  The...

Leontopithecus rosalia photo © Su Neko Even a monkey is not clownish enough to wear an orange tag Leontopithecus rosalia photo © Steve Washington There is a psychological rather...

African elephant (Loxodonta africana) © Muhammad Mahdi Karim Animals too can be meristematic Meristematic tissues are best-known in plants and currently defined as restricted to...

Heterohyrax brucei photo © Vladislav Jirousek                                  Rock hyraxes know no way to gnaw Rock cavy (Kerodon rupestris) photo in the Public Domain The...

Petrogale xanthopus photo © Peripitus                                   Rock-wallaby is no marsupial klipspringer Oreotragus oreotragus photo © Neil Strickland The yellow-footed...

Equus caballus photo in the Public Domain                                  The improbable complexity of equid dentition Equus caballus skull photo © PD-self The teeth of the...

Hydrochoerus hydrochaeris photo © Dario Sanchez                                  Capybara: more than a giant guinea-pig The capybara is extreme in being the largest living...

Orycteropus afer © OpenCage                                  Molar mill of a massive myrmecophage The capybara of South America and the aardvark of Africa – both of which weigh...

Corythornis madagascariensis photo © Frank Vassen                                  Fishing for any hue other than orange The Madagascar pygmy kingfisher and many other species...

A textbook assumption in Biology is that the amount of water available to plants is the main determinant of the height of the vegetation. For this reason, the tall savannas...

Bos taurus photo © Muhammad Mahdi Kari The dubious value of milk in otherwise sufficient diets Capra hircus photo © Fir0002 Although accepted as a normal part of the human diet...

Leopard (Panthera pardus) © Bernard Dupont The rosettes on the bodies of leopard and jaguar are so similar that they could belong to the same species. However, only the jaguar...

Distribution of Canis lupus photo © Dreg743 Dingo: jackal as much as wolf Distribution of Canis aureus photo © Goran tek-en Canis aureus photo © Prabukumar84...

Borax crystals photo © Arum Dulyan                                  Boron as fast food for bones A deficiency of boron may seem an unlikely cause of arthritis and osteoporosis in...

Loxodonta africana photo © Rob Hooft                                  The relative elephantine Although the African bush elephant is often photographed, its true size can seldom...

Aepyceros melampus showing honest/informative display photo © Yathin sk Confusing versus clarifying flight-displays in impalas Impalas are unique among hoofed mammals in using...

Canis simensis photo © Laika ac                       The Ethiopian wolf’s white gloves Of the five wild species of Canis in and around Ethiopia, only the Ethiopian wolf has an...

Common Warthog (Phacochoerus africanus) © Bernard Dupont, via Wikimedia Commons The desert warthog is more massive than any indigenous mammal on the whole continent of Australia....

Connochaetes gnou photo © Kieth Offord Illuminating the darkest of wildebeests The black wildebeest is really medium brown if described by its pigmentation. Its blackness at a...

Connochaetes mearnsi photo ©  Stefan Swanepoel Speciation of wildebeests across the dark-pale divide Connochaetes albojubatus adult male photo ©  Paul Mannix Two species of...