Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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В Севастополе ликвидировали три воздушные цели ВСУРазвожаев: Военные в Севастополе отражают атаку ВСУ, работает ПВО

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There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.

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Critics, such as Greg Smith, MP for Mid Buckinghamshire, say soaring costs, delays, abandoned villages and damage to the natural and historic environment mean that it is not worth building.