The Thermavault refrigeration unit can keep vaccines cool with a reusable salt solution. The teens who built it plan to test ...

The invention uses salts that pull heat from their environments when they dissolve in water ... barium hydroxide octahydrate and ammonium chloride. "While we did scour through the entire internet ...

One advantage of the ammonium chloride solution, the trio of teens says ... and collect the salt in its solid form, ready to dissolve in new water and produce its cooling effect all over again. Jain ...

Singapore’s president Tharman Shanmugaratnam dissolved parliament on Tuesday, setting the stage for general election as the prime minister prepares to seek a mandate cost of living concerns.

A 24-year-old man here has been arrested for allegedly killing his 10-year-old sister-in-law to take revenge on his wife for leaving the house, police said on Wednesday.