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Description
17 ecuaciones que cambiaron el mundo - Ian StewartEl progreso humano contado a travs de 17 ecuaciones explicadas en un libro de lectura apasionante. Claudi Alsina Las ecuaciones, esos conjuntos de nmeros y smbolos separados por el signo igual, son el alma de las matemticas, la ciencia y la tecnologa. Sin ellas, nuestro mundo no existira en su forma actual: escondidas para muchos, han constituido una fuerza motriz en la civilizacin humana durante miles de aos, abriendo nuevas perspectivas en campos
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
Based on 1204 reviews
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Product Reviews
★★★★★ 1
Not worth it
Color: cow
My husky puppy ate this thing in less than an hour. The rope arms come out pretty easily. Waste of money unless you have a tiny dog that doesn't chew much. Defeats the purpose of having rope to play tug of war when it's so small and easily torn. The chewability is null with this thing.
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Reviewed in the United States on March 18, 2026
★★★★★ 3
Cute
Color: cow
Cute
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Doggy loves it
Color: cow
This cow toy is awesome. It is made really well and will stand up to my tough chewer for a bit. I love that the arms are ropes for easier chewing and tugging play, which is my bernedoodle's favorite. It has a squeaker too of course. It is a super cute toy to add to your dog's collection!
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Reviewed in the United States on November 29, 2025
★★★★★ 5
Favorite bones for my dog
Size: Small, Color: Pink
Dog favorite bones, but broken fast pink bone. I buy multiple times.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Great for a teething puppy
Size: Small, Color: Pink
This is one of the best training collars we have used. So good that we ordered a second one so each dog has one and we have recommended it to several other people. It has 3 options, beeping, vibration and shock. Each option has several different settings. The collar comes in many different colors. It is very sturdy and it is waterproof. It is adjustable and the clip is very sturdy. I had previously bought a different training collar that did not phase my dog in the slightest and was a complete waste of money. It always seemed to be low on battery even after charging, this one however lasts like a week after charging. I will continue to use this brand for sure
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Reviewed in the United States on June 8, 2026
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