Ancient mammals that lived in the time of dinosaurs were mostly the same dark-brown colour, according to a new study providing clues about how those mammals evolved as they faced giant predators.

Ramanathan In a study published recently in Nature 2, Veerabhadran Ramanathan ... Atmospheric brown clouds', which appear as a dark haze on the horizon, are formed from a cocktail of warming ...

Melanomas originate in the pigment-producing melanocytes in the basal layer of the epidermis; they often resemble moles and are generally black or dark brown. The study highlights the crucial role ...